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 0x075d159fc0b4067380e2ab22cfb23e3458a3b49d7ba45b7fcf132d607b129d41. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2816de20-fa1b-4290-bfe0-6af782903619.json and https://artists.proofprofile.net/proofs/artist/2816de20-fa1b-4290-bfe0-6af782903619.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 0x1d80ed814e541c30e503c3bd53accb2700a847370c9ba81f6c47cd5a93d82cd6. 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/GXHAF2510395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe300f0c29330b316d1b163080a05ae2caeb11773566fc598a9b0534f3459ce71. 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/GXHAF2510450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e19c3316045dfc49c7d35d69f51eccf63972e93664d0115592b1c3e24cb0ae8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXHG92547669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b68dba169bb27824919a91f698f99bde1cbb94c882cea8e456cadcb0eb434. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXHG92554066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d121ce75c1222e6435bb0b131d556c0f9b99505c93365160d7924ebffafb89. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXHG92556344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4559ae88d2c3e89f528acb6553640228d2e8f5e1367101cb4c1561c42b3fcc02. 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/GXHG92554349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3510245d947c8745ca0894252e48c1172cb7fea4cd2cbd6cdaa6cd15fd47ab4. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GXHG92560374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e391e9ed75ea8468d3cca4a18cdeb7dcb0f2aa3d1bf3b72bc0d101ee31b968. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXHG92562042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3d4d2a70d629fcf8a5f28da4064f100726219b9b59cbe6bae27a3845859b4e. 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/GXHG92571779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d9038453145533320c95cf4e810ca45df81a647ac7042081b3e1056a2966a. 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/GXHND2525220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa57ef9c96dd0dd56d798f54c4dd2f204266ee444843a8e53182e24157af26e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXHND2539523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5560f48248777507fc3e77ca3269e59c003f7cfac48889eeb85ccb4959df93a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXHND2539520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446e05e10aa7bf2cd5f237f9e0e4afe8f3be407e636293a4041370b87fd7fb37. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXHND2539521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61995a502dda38799e245436d7281e086cea930ca40c7b07368a0573bf9d504b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GXHND2539522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c659e6353f4ed2e9d3be6cebdd826403fb9602cd26ba6b18530fccc7c4736e4. 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/GXHND2539524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad2d3f83204a5332c179a5a6572b9ec0dca3da017343c683fadb14ef740d7f7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GXHND2539519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149d9f328949a755e647a04e3f4fd295cc6686d4f3bc9b75407ac20c9c553876. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBMA22600747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a14709f154f1604a1a2e6856bc0fecdc709834d3df4fd9f8b03a037ad9a3a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GBMA22600746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd80a99a47446b51f8540552f3a0aa8fe4515300b52cd68eceaa989b92df892. 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/GBMA22600749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85848f0b2b81ef0d4bc95daa1d294f7d59ecf478fdd682b4d88e719a1c96ea. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBMA22600748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30a427d05210e151065d45037bbe747f3c953b3ae3f81b458f415692a07579. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBMA22600744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c74474d55d4dd007871b8c74c90a47740f9125f1336695a57d0c1f303ce8592. 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/GBMA22600743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd67f419fddbad5cf2fd012c48ee141f3391ad267ba5ee7203fb4bb984182eb. 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/GBMA22600745.