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 0x88bbebc7ad1cab0b4961692871743e8178284c7cb0730c7080c6d90012fcf4d0. 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/9b1a55d1-e498-4af7-8f82-9e292eacc3a7.json and https://artists.proofprofile.net/proofs/artist/9b1a55d1-e498-4af7-8f82-9e292eacc3a7.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 0xefe1600fdd99065dc65358277669b68a5e675be0eb6140aafc8a0644e1f92db2. 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/QMFME2325096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5723dcf4f647874c1dcae7cce3cf803fd05b5426809770d617698984c4c4e. 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/ES8242446901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c84efa62c02ca436e5f276b4c8f72b9233d191c4279f6baf492acaf6189db. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/ES8242446903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82df8118238272ad8228c7c2bf3b158cf20f088937da5b1986c6c46ea6acfe85. 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/ES8242446902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36447442fc791c7e40b26af6e9c1021af08c98cf73939d6e8f8e0fa0672af7e1. 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/ES8242446904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf5723dcf4f647874c1dcae7cce3cf803fd05b5426809770d617698984c4c4e. 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/ES8242446901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d787f232d9b47ce21098a321fd79e99ab35f2ac1d176afb9401e28d6258f08. 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/ES6102329103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd301edb069c09e92ae51f0e20783cbc6e6ab3415f3d5746f6675fdc73f1df79b. 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/ES6102329109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a79a82699a0d5258774f93cf85be3a131bf74108366921dc6ceea74684ed82e. 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/ES8022200221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446b5507eecf0cf393a550e37900550be1bbed7485a14ad89e97d606a8cd73bf. 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/ES8022100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7052c93d77f3902400769163f6d7e940934d2b2c3e22cd54e4a3a3189ff97ea4. 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/ES8022200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a377f8b0e0711b4fd605eb78a37ac6a2cb3c9c4f95481e9088729a61b6a2ee5. 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/ES8022200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5352a92f4f5ebec43985804503a542d9aa83ea35b9978ed598da4a8ffd5ad42. 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/ES8022200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4680e5bdb6c7ceaea3e1c5787fc46b44d2aa9800a306710c972aeb0b4407bc78. 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/ES8022200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea34b9ed0fe5cfddcc08a46d14fb5fb9244110a38ee4cc80803f97451db8d68. 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/ES8022200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2121c213e13f89f43838aeb0c205a0ce388768eb990f55d135f01023ca9dc0c. 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/ES8022200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc76a2ad126432c321e5a436c0cabe033c011761e0027c62e95f6dcf1b6fab47. 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/ES8022300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7af6c69831cfa18ba24d2f850f59101c343e5a547404441b83ef45412abd860. 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/ES8022300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354228ed7e64fe2aa7be95f01a48b4bdd205e63e0ce01b25861142710a3be438. 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/ES8022300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751e37d70bce5646087e1bdf04e92e9498bc6b214eaa43b850b21f6dfa651290. 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/ES8022300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b3de74f67d4c307441bc5c3dba2d1a633708935eb7a05928589df15521036. 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/ES8022300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f7b8d23d78798f065e60e48b1665343b6f4ab596bf08db4105d70a99df137c. 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/ES8022300016.
ARRANQUEN VINYES (Romanç 6: i de transformació)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112a50c6867c5754664454fb0990058013c5e8ade6d4c8b06d62226e21f175a. 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/ES8022300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750a289df37f01cdc2c9022833e92fd4bc09fbf69c00c7db26543dc5e7f0c309. 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/ES8022300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8daf2cf0419c7ece893b73cbe15e3933072e9124666885e3430d993ed031565. 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/ES8022300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b3de74f67d4c307441bc5c3dba2d1a633708935eb7a05928589df15521036. 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/ES8022300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de6be16195f8c0d59276202ad5723efc155845d5f5d7c618ed6fe46032d7ae9. 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/ES8242442504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c266bf5007a9779c5e26dddb01bc02803e3ccdedf50db19175487f0a87fd61b. 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/ES8242442505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e26159bf86f51dfeb21005e18a8f365ab4c6edcd143dd790e4ddfb1e55f1eb8. 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/ES8242442506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cdae8af9c4e5f37b249005b37f2fb7f969161c6c646c10f871a1472aefb68. 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/ES8242442501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a47cc6bbd3de6acc198b3b5d0b2ef2430dd2e3bdf79f313a08a3ba71adb74f. 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/ES8242442507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1cb8dc6ec514234ac4abb6a1356905dcaac16edcc0e20e9629df61c46acb1. 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/ES8242442508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62df5896fdbcb8414b6a2d568f4853b14ab37f9b8bd1cbfad990309d0aaa04. 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/ES8242442509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d312541f78f23c3369d4ba2c45f1e0e93ae8f232e3c76ee61f0c45f02ab902e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES8242442503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e687ef88447f2c05a774661864e7d44e1e8c21b3ed8a185c43efd88f2ac0b95. 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/ES8242442510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8814d3cb41cbf57565fdc4431147a568b5b13e0009a66e7790979f0881d93137. 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/ES8242442511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad849d1eaa506642f3b7e36c8cd72fcb1e47d925673070b42ae27cceeea428. 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/ES8242442502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d710b67a6bbc4968de5a61830395652e43038dede1539c50fa5b278c1461b48. 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/ES8242442512.