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 0xd6ea736c5d9eb92326aad0cf47aa8b6015e460c85caeb4a6a101c40f2ce0aed4. 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/b4824e33-58c4-4ea4-817b-c9ae754afb82.json and https://artists.proofprofile.net/proofs/artist/b4824e33-58c4-4ea4-817b-c9ae754afb82.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 0x716c4f854b36d9a6457eecc543ad1e2d9f426be8474be0458536b1e91191700c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US4XG0410909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ded0d9242c314f340d45c28cc12ec4998ec2dd077f4ec54c014c1af85a6cd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QMEZE1738533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6272e86a0c3620dc1671fa0d653783bfbeae876cef0218705c5218c809bd21af. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USDHM1515885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4231677dd090f32f96ed7b75ae397f042361d475506ecb2a707087774d3c5ecc. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USJTQ0904918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3cd3aca10124cf2a87e6e883d9923d74ecdc09ee1a5df9c62c9c0b72412b53. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/USJTQ0904919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380304a1cd0c9e2b9150375e65375ee246af01f454b8cfb0224abe01c9507a33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJTQ0904922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6004a5f5a243f8c1b6080ae781cfee2b116d15c06828cfec4c1f49e0432a1c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2X41506887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aea853a34e80a7a0e15dec8eaff9df56b9c63cf0eeb1a0b6c91e389b7e7876d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USRMK1005003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c329113549e8fb0e58994e90ae877965419442d696fddcc90011a61891ea89. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USRMK1005005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b36537d3d7649dfec79c83903d6347db303fde7bc9c480ef1a8edb8a2c1e2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USRMK1005006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d1c55a29b8b41df2b4312a35ba30d68673ab8c4fa754046b9f162e04e32d7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR2X41545385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13214344b6f996cf2e934bd94dd64380a4f7aa44941672c17a1caf6946cfb89. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USANG1401312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a9062c063b2acaf23173f828f6289b32e842e22e3c780d0c13be306a37018b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USANG1401318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5615eb7bbf680bcbd3c14b76996bb3555fd54e1c826a1c987baf586f3405cdf3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USJTQ1312275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fca8ac743cca43ef1be4fcbf24093b68b24181475c4bd3cfde579f8e701ffb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USJTQ1312276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b799b63ef6eb668ce07fd0d706e7e2993fa65255da9f34a3420e2a2073ffe1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJTQ1312279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28de9fc9682a1509b1da963025d264b9553003c181c6cf9cc64b261bc9f1c1c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC1662215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7fef083a170229be1a008a809b166d6da03f72fda9984ae2555baaa088edf4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6DC1662219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bb4c4a604c8b6d05a12595a7868829b34caa0dd2f7883487bb2dd2c15c3b64. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QM6DC1662220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2130bcedfded540ec6794d3de2fa4ecdda5fe916d9254c0131b77740b0d4ea37. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM6DC1662229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e2ff3d74fd7239671756645e34a9dac93ffd161e37a3cc0c90aa752d3e560. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMBZ91689482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c8114815455c5c19c1720f11d35ad34087bb04582621a7c6a57d7c0e209346. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMBZ91689486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6cd6aad1d0993beccb4c65a2457d0dea2083395d8fd8dad46c6b3e8dc4559a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMBZ91689490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e998b35607ae7f2256b71af832824e58efbc86da3815e85a57ad2181ddfdf7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QMBZ91689496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24fc20fb26777829269eed8fe2194f370dbb942977365ee126ee3d56b7a5cbb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMBZ91689500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029771299ee9e7af4b26940d61a258cb7887ebcc2e6c398e791b19fec459517d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/MXD481806156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d62a489037912cacaacdf63be72e608802939a2f23234d5413cd5daba2352. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MX3192102763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c0a60355df95f36e645ca6b55f4527ef7b94595a6db580968e27ba61d8ebf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX3192102765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac8af93b4a08a64a79c4e23bfa27106b89ab4d1e9fa1e591e295feae0db2003. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/MX3192102774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dc796226652532f07a7e98c8d5e401076bf6889feb4957859e96332db688ab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MX3192203838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b535ff3aa320e70b347001e9b53f129cbd423e00ac005bb53cdc3a4c3b60aa1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/MX3192406072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b535ff3aa320e70b347001e9b53f129cbd423e00ac005bb53cdc3a4c3b60aa1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/MX3192406072.
Mexican-American Border Music: An Introduction: Pioneer Recording Artists 1928-1958
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4f1ccbe3c3799f6a6872bc1e72b924902899ee959ee185786be6811114bdf2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USAP39470125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa920de0aaf323f6efd0072eeaf49c3afcb898cdabf46cc3c48eca7dd964f2dec. 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/USZBG1300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7372f619b9195d26205c729c8bc362944d4092093524daa59a11c9f8e08ffb4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMHUY1451780.