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 0x1940ef2fc153747776c39b7644e070470dcb899ceb876517963b1732c3ec8bab. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d019bc7c-830c-4798-b51c-19d9a1d3b0bc.json and https://artists.proofprofile.net/proofs/artist/d019bc7c-830c-4798-b51c-19d9a1d3b0bc.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 0xbd68bae8e0a94d2cf6bace2ce477353abb482099845162c20e0a76993c57a9cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PT6JR2200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b4e74cf54126d993a4d68ae9ee8506eacc2436d3f8ad0fbcf8c40d35752257. 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/PT6JR2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd61ec4883c10c095e7800202fd2ef1259a1d9831ee2cce76abb981cfbc34d9d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT6JR2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf4b53b13bf3fe646063e30acfcebf85a10c12708dafed18c8be819894670af. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT6JR2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15586ac942256569a8d5a4565cc565216d26a2a53bd2bfa81103afda8fc6866d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT6JR2200109.
Ribatejo e Estremadura vol.II: Abrantes e Alcobaça
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6203027ea5e9d6b9f1ef94f29d496803951879bc491de50307c85da2364339. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:20:10Z), 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/PT6JR2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e37f115d573097c02b085685cde806f84914159738c69a30d2251bba4e3d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT6JR2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19debb3df4a6998f1c956d8c8552e53709a531ee392163c4a5a8b7395d228a6a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT6JR2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29403f6548e77a2a304848dd14a2a65b52baa6b5dbecf31197d8e943cb0028. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT6JR2200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890c1122be456a915d3ae23cb3969f75556107bd48bf7ca2cc8609f53a0e737. 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/PT6JR2200039.
Alentejo vol.I: Évora (Live @Praça do Sertório /Évora /Portugal 13/07/2019)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b31a473d278c6296ad926476f90f1f089836fe904f2e115d62cfd5ffe9c1ef1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT6JR2200248.
Beira Litoral e Ribatejo vol.I: Pombal, Alcanena e Tomar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3895cfd3c0d9f0bd178af9415c065c692d64e4224081bb24bb37e27ac25a7dc1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT6JR2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd768c412dce6a2de2bbc845e7e85ca5a1a5663643b1ab555bbb67b7526b5bdd0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PT6JR2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9c5bf31a2609097d7187c3c8c336df3c5a78128863e168d9723f68f293106. 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/PT6JR2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fe884db9737d54464981a384032e93dc3577dcf8070085b36fb877b66f884. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT6JR2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b68f7be3fe146d82574a07ad0293512894ac519817e76e00187fa855e658fd. 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/PT6JR2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a114f232365b58c879631321f7263115ea73f4a77e3990552eb52ab560e1c0c. 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/PT6JR2200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9716b9831dbf216c0e09f7b5a8b843a98e7d76e1001b1d115570ef5497407692. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT6JR2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a42e9d3329a0f1250b9fb917190c562b5487a38785a6c2428e7a5f4a0633278. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:43:21Z), 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/PT6JR2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9aee7f6633fb3bce1dbf17282922af32dfc52284cb5dff9df9816c40a4b38a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT6JR2200221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b32da3ee57837d0d229a8513d569ead7948b5ad357a56403e77dc2256119d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:34:27Z), 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/PT7CG2200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28496d64319edaaba9e1b92fa055e67de55fdab5d3533a2fe130e21fc44e0127. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PT7CG2200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfb68f05d35b95cd5ed5c2a9cc2fe8b6cb82cf2d503b5dba7ecb8faf6bd4db3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT7CG2200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eeb5bd421d7c57516b842a3d7a0cd76ad3af374376f95c2ed528291abe6093. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT7CG2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5ba0e9e25119788878c2bf1db1a176607f00fcbb53b05757e404c8b0a1f7e8. 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/PT6JR2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bfd9376fc281c576cebfbe47b15adada898bbaf5a3b86305dffe9df3b9a2db. 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/PT6JR2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9911052f557539b8692dc0a6d95675a075fd04d4ef137d7876e1132afb28c9d4. 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/PT6JR2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dc31e1a8474bab44d06f86eef693e2ee27b5aedbc3d4d6a61f39900d092809. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PT6JR2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a267f40a9c9e864f7d6c6546613c0cce55dc0082cab31d2c5fc5aaaa3c6854. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:57:36Z), 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/PT6JR2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1168f19e63b9e77d7943d5a8a60b79521e02485b7c62be63ce298f034cfaa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT6JR2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b01f40cbb4da77aa7293ac4878ebc3476c25a0b15fee8f4792e900d495a6b12. 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/PT6JR2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fd6c3cf2be90573a03439984ad3c6d4bc51caf96be8a8e7b495bf73da1590f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:44:51Z), 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/PT6JR2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0568cb2f05a81bc6d0f375ecd12c7d63beb6af36560c824d4617acd1c2c587. 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/PT6JR2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bfd9376fc281c576cebfbe47b15adada898bbaf5a3b86305dffe9df3b9a2db. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT6JR2400018.