Povl Dissing (27 January 1938 – 18 July 2022) was a Danish singer, composer, guitarist, and harmonica player. He made his album debut with En aften i folkeklubben in 1965. His public breakthrough came
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196eb9de5abc794f645739820c5cbffefa1216bf35cf91f76cb8057db555cf5f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b13d2bdd-4653-481a-9a5f-3c3895cab842.json and https://artists.proofprofile.net/proofs/artist/b13d2bdd-4653-481a-9a5f-3c3895cab842.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694aac2964a6f8b5bb86826ae1e20347754c573a10a93f3b04b209a31ec2ecba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKATA1300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21aafdc7132c5c22b37a336c4c929e423f754db0a1e85b6100d62d1cfa7e57d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f1cdb79dd4cc2f5ab05cc6c6f7772694ba46da30301433693f2ea541d1b733. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6b515500df8fc24c175bf20dfbddbe90f08809bf76eb1a08d1c815f872ff2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7e9707657544683ac3764dcb2ba8f417b1396e458f60816320e190308850cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb118973837d2803cb45b8321731f5584319b6b7b2cb3d09ae3bceb2b7159c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef2982bf978e95bf589f766dd4f8f3bd606debd63d890e69304079e518f791. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860df72ab7082a901b9a1577612e3221b2fa8a25b0a322a55777a353850620b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b320eb25ac7abe434bfb6eb2f2cee731b795faee7f8e4ca761330cc2a02e35. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802fe3b2c61779d1953e774ef9ed1416c7a5f46f5b2fe9843d88923eaf9c91eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23f73baa2d0f5892624e21c7922b90acfa4bd9df1e30c3c029c98b8ff21eb2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9f218aa11e53e725ebb36c985402915180e9619d964fc9e84e196fde5fc51c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819ee609d0e5b27cc7d4a9376820fa490d8f08cc6e42b4aeb1c8eaddc5ad9667. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d96fafc7cd7d5679d13b60840daf09dbbe24ad9c40178a5dc4ab1ca191eb068. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47028d483f33e107953aae322b0efb7649a4eb4837a5bccbc2fb5c6075bbc7b3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c62d40a88b0d71e14db1e37945abf2f790e56ec17bf87ffb0fc31ba6053a9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd684989c9f66dee37846cdfe2f0eb056e6cbe6ced0f8e54bf491192269fed84c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad81907137e59802095edbdaefd12168afc6b0c9a818381fc988d50939d8b1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKMFC1000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f6550918aca4d56e566502a78e597bbd6fdc4bad6818710b76450e95ca5c91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKATA0100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b749b76b4f1dcdd7059c9c83a1e92c97ca348342dd5f7ab462ac66e74a330. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973dcac2c7d3ca5666c4267c0dc45878695e0602bfa2e2e027793a1b1ebcaf04. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579e07c00a3997626e18073ee9741522af344666fcbadc221513c992e6a099f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8f812c6c358510b00e4cf2960fc286dd1d2fcf3236995eb38c7adbf64416f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de15bc662e84b820d31191b43ed1696f1dccd8aaba437744133ceff6ba2a08f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6b1bb2fd7f1bd63c7c361a74db9cd9f199fc10f4d2325e6e4cdb0a5cd5903. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc4a426659f2d6a17fbb49babb17ed3e70826b296f3a0435a9d36142f2e0fa3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55e038f7a4ee56584119051f6043886a97d582da8d5861181e8b07584dfd2a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe7e2d567415077e19d94033f386c442b87bb1f4a1e4e6eb1697aa6e238cde. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b48adf43b3971debe9c5eccddab3ce8c1fef416a29f3ba9f18ffc709b30802. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec4da7473c3416fecaf87f268a819181cf045d5f32549c4b02e5489f210effd. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d8a4247b70ef7f8241c0361e13f171673b64dfba4ca1ac836fc4141fae841d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d2085d71937eb41c379372935cc2b1d2400256117fe546e8c4d03749667ef. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e0ead78b6d309dbcb50efcaaf363e1c29895be7e4e5c749b8662112431f56. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKATA0801501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab792209063d8fd199049ef4f2770b7b2545d3fde5feb2329bd78858bf10d1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKATA0801502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c644c9d5054262d18ccdf15872d47164a7752ddb2efaa62fdd2c3035a2d6e0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKATA0801508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd804ddcce6911c5926c2e7e46109e0ad88dfb90be053d8fd0cadd9abee96097a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKATA0801509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6cb90c5743dc72072ff4c18422b916380cb853ca350115c557858036cd9e24. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKAAN0000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb746ebd57d168a6a1e44ad2500105a1c72f4ddbd07992e5097f161266c1498b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKAAN0000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee484682be33fbb594b560c2ca8816b5335aea808283b4bb1765a5662bd3d1ae. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKAAN0000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b48adf43b3971debe9c5eccddab3ce8c1fef416a29f3ba9f18ffc709b30802. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKABA0601280.
På Danske Læber (Leonard Cohen-Sange I Danske Fortolkninger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026cb398eefe4e806f53a695f37838cd1f4d4dc771c76c31cdf6d878383a604d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKI9A0400309.