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 0xe9bee9c07452ce528cbf7f94017f81893504b5a417388fc71c1fafaeed26cc9b. 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/8b7067e8-43e5-4be5-a53b-a95dda5af864.json and https://artists.proofprofile.net/proofs/artist/8b7067e8-43e5-4be5-a53b-a95dda5af864.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 0xca4edd6e2d0e4f57e55075e66cbae0e4e0133513b20b8056a0a684bf541901ef. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM6P42556276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455eae004eaa1202d4e0650b35e0aad88f045638dd75932a014542a5e24892f0. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/COFC10101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f7b9d6dfb6db5dc53425f0f936f3a5e3e27218e0b94c5a7cef611502391765. 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/USZZR0810155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463f1ff0ce8226db0048012e73cb591024acff1e12dd2ddb9610ca021909e3e. 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/USBL10200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e18ae92555c897b6f453e49ec6eef51582770cf17b30999ae944d2739efd82. 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/USBL10200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b758f808235ecec9dd2039ee090998f2f790ec20295d206e2a97864c22c3171. 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/USBL10200071.
La Continuación. María Teresa y Danilo (Parte 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78358150525f46315f8cc7afedc5eedf991208e6a6b379236227997e2710e722. 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/USBL10200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648707cb3f2c3cd5e2af9867514631ef1a4ca2d52943895d89cc0f9412fc05fa. 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/USBL10200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5da3c51afaab702a5e3f4f2084411cbbf1d5dc122b3a218bb95852dbc2b9c2. 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/USBL10200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00be8bf052297e6e3e0d0c3257ab007a68755f91fa583d2f44ff9871b6b5fd1f. 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/USBL10200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad14633718416c0f2b01496c86c0496343b8bc06ef7132949cde7eaf97c6f3ba. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USBL10200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32c90b5d6fc3d5f41d9597ccb37fb1bda41ffb6ff8b7432a10d9097537e52af. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USBL10200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6092845f73d5f413b0380b17b6fa466e9e9ae2888e3e2c524625f107a2003531. 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/USSD10104891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca9fdb7685dbb299cf0b0d3db3ae23ae9d802f4e330098abb0f24257b5b8c55. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USSD19800996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463f1ff0ce8226db0048012e73cb591024acff1e12dd2ddb9610ca021909e3e. 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/USBL10200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648707cb3f2c3cd5e2af9867514631ef1a4ca2d52943895d89cc0f9412fc05fa. 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/USBL10200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b8cfe96e0c6a5f5c3ba0b20175f030c57a6d2f3e165bfa9c17833a1e979c48. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USSD10604607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ce1b454e2e9fc548da8ad42e8c21336987e8e718867db0654c737d74d36994. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USSD10604603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be4ec3f41e7d828cf990109dfeb3665bf8432b2bdafc0e7fdd91e65ca4fc8e. 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/USSD10004336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be4ec3f41e7d828cf990109dfeb3665bf8432b2bdafc0e7fdd91e65ca4fc8e. 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/USSD10004336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4b60161456d83a4f5505c2ba40cb4aa292c4c2b557758b62d1674d9abd12d8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZ7R41852307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ebdb26799b4a721cfd7b76b7a5593baf688ecc2816c8c9d49786be5c9495b. 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/QZ7R41852931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f64312ff2da80474c946abdb3b036fde2aff0c4f7bcf25c16b9cc162241ae8. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/ES5832340489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecdf78f6b241048dd45fddaf451eb6318ef8230926008efe39ab078216fefce. 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/USUL10200530.