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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce931f77000d0b4dd0068902e57272405883eceabdfa9d6d182a05f80487993. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33b48662-9fc9-4674-ae5c-b01c695dce0b.json and https://artists.proofprofile.net/proofs/artist/33b48662-9fc9-4674-ae5c-b01c695dce0b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e325348f07a8bfd79403c4b5ffa765ab961ca512f02804f9e08febb200cff. 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/DKBV70844001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae841b940d9c711283515cede873efca4b4bcaca7eb23b0a602b1f519829fcd2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKBV70844002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab2b04558c640f3182bef94785c2ad4dd917329e8d52df994f469b29bf3195. 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/DKBV70844003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2889ec839c82806852975889e8e345b5482e8d1039082f439f5603b6f8e79ede. 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/DKBV70844004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ad63ce6d7b2a1add94ad37809b01e488c84c0a43b19657e234ee7477cb6531. 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/DKBV70844005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5491cb5084415d0be7d54e0d07f9dab685e95bdc36846ce274107358a6e9c3. 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/DKBV70844006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed948585816c9d1630557e5002d1a3f1f85389472ab6451ca21d0e0b3f4420d. 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/DKBV70844007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886da5ba42323e682c2cf3add25dbb9316b22d7b0ae3524ca22ffbcfdb974ba5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKBV70844008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93882ccddb0b6f6a3a068afc2ab273613f318f5c8fe7c3ae66c013de9a1c9b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKBV70844009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e1d31dfe25472bdf64c4a29789f6b800fabd9c4bc282fb265c2d907f7c7953. 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/DKBV70844010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14d8c3d41d640bb8059436a6aa47101fdc178673d202d4ecac2d10d89523093. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKQP51405601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899d0627c068f553ba6e14504a15ae751a442235e9cf73476063633bd472804d. 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/DKQP51405602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f0337a937824565083077a13f90f3f198ebc1a7d15260c92c02a81c60b4cef. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKQP51405603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a6bcd1e7a2dfc7dc171aefb92d5c2b0f87f6f980f8f5744340ddea7d4dce35. 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/DKQP51405604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a293cebb372ce4a749e416533bae79f605e8e73e40c30758c2f4b937f3928c8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKQP51405607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff47d9f620fb08d6717163b8ff7bafadfbabb5c49054883c2bc005d95111cf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKQP51405608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca92420c39e4d9c60126c3b0d8338868be219695831b0dcb58ce5b8f0ff1d6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DKQP51405610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b281091f3758e2902f134a6b1cf425ced971953e4ef7b613b1b02ffa42b2ee8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:33:36Z), 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/DKQP51405605.
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 0xc52635ad94a910397b19848bf88420c85f2bb65849042e56942994a602d3f44e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:04:51Z), 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/DKQP51405609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76585490831c947bb8e1e895a57a56cd19972639ead8fa3ddbc6323e0290dbd0. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DKQP51405606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92d4cd88c188449b78b51def49ad7d76f23d79628045d28bcb6d4e5bbd8ce79. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DKQP51405611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e84ac2753c0c450701dd146c97c620cc59540cffbfa80f98144b34a43ca1820. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DKQP51405612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a5140ced7d5eb901a59d02b59c25415457d03ccc26e6b5d98f3cc78be8bb83. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKQ1C1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83381b9fe5fa99deb07c9b874836a8cc858a3df2f020e77076e504db7a47d9c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKQ1C1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfa4e04428cd2073ff6d85d5dab538367a66d7786eab2d92bddfea575c3f985. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKQ1C1400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74808684a6e5a204637ac3eac00694abb19506d39e7d76f089b4c9ccb1f46625. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKQ1C1400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0cc3c88423c04d94da46f399846678bfada1fd18612a93db134e85bbfacc13. 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/DKQ1C1400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7b510a151551fef2de1861d95bdbe939950a06c3974d62a76ba68e10b163fc. 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/DKQ1C1400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd06df8e56fdb56b867279e4031312bb5a209f1ab5f68abedfc977abad27d0c5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKQ1C1400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620b94694c3cec123ccc10fe34d091d35dd727bc4b5ec88e31e13a4a7d92e222. 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/DKQ1C1400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0719fca1d68a8d57525babc6e3a436f9e28ce920cf8c9dd90d8f581aa5fe4456. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKQ1C1400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfdf030c255f50aee91e7873aeaca1254fcd51c84cb9b5c827b9936d4d7e3c0. 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/DKQ1C1400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c93ca9ae0f2fef1cc20473d35870cc41e8399d2ec78d27776c29d770887ebf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKQ1C1400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfe3a0935c37be0492fff4dd23e8f07d6092ae73e7e60f262886eb98eec3a85. 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/DKQ1C1400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcca65b56ad86012874e7bdf090ebe29e54c9d6d546577c06021ddfef744025. 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/DKQ1C1400113.
Efterår (feat. Jørgen Leth, Mikael Simpson, Frithjof Toksvig)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8581cb11d00cbf289613c17826c24b9ada34a1e7174f3e00a105728a951f604d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DKUM71600236.
Blid Og Bestemt (feat. Jørgen Leth, Mikael Simpson, Frithjof Toksvig)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892dd5b49df5eda5ec679a720c414a95582ec5bd681bef8f2a99f11dd1b2cc8e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKUM71900077.
Det Var Ikke Mig Der Sagde Det (feat. Jørgen Leth, Mikael Simpson, Frithjof Toksvig)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bca5f1d6f8f67c099eff75ed520f0f19f8df3563b61bf30a3736cbc5a8eb8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKUM71900079.
Hyldest Til Bogen (feat. Jørgen Leth, Mikael Simpson, Frithjof Toksvig)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4a6ed7f56efb07a5b112d74c74afbc701001df4bf3159a22fb2d28de405bfb. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:56Z), 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/DKUM71900081.
En Deal (feat. Jørgen Leth, Mikael Simpson, Frithjof Toksvig)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e65f89e78fe7c10d877af2cb9c90fdb20d7bdbf34ce78d26c08e4153df573f1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DKUM71900082.