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 0xc0ce977db1aa9c8ba8f1001bb04f763af3e65203a8aefcee054d52667915e0e1. 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/85507be1-127e-4ec5-8088-59b58808042b.json and https://artists.proofprofile.net/proofs/artist/85507be1-127e-4ec5-8088-59b58808042b.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 0x3a9b97613e1e4967d8eee58193078a60bed1850dc7942be453abfe8f2dda2d7d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ES71G1616048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b97613e1e4967d8eee58193078a60bed1850dc7942be453abfe8f2dda2d7d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G1616048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd81292584e713e5378940c34f3c363553827edee2c8131b745c52886f1f2d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BXC3A1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd81292584e713e5378940c34f3c363553827edee2c8131b745c52886f1f2d. 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/BXC3A1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee95e8a6688291a7dd3a9ccbc375327f2e530433136aadc56fe04730bf597176. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRD1E1700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e69aef4f2301d67ab71384e185ef52b37efae31b9afb69820b8d497367bc65f. 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/QZ5AB1888063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60715f9d7c754a5042bcf18d9f4dc5986c9c6e087f64edaba8616befd5ea724b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/BRSME1801399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a92f3986dd1b5828531840fc00c89be3988509ae5ef38bb73c66e784f22592. 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/BRSME1801400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1effc4c6c132c572e715e6192552c255ebb44ade44fe566d8532bf6aeef1d046. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BRSME1801042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9511e56a56f0701b99ba5d9e27173801fe17207f3e27032e213261b5b02cd6c5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BRSME1801041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfbbd008ac0871ecc2280c593ed3ee1119c51e561f55363297cb9c5fa517c6e. 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/BXC3A2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfbbd008ac0871ecc2280c593ed3ee1119c51e561f55363297cb9c5fa517c6e. 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/BXC3A2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46eeb78865d95c36bd1627147cbe5a551beaa1659e07f4fc19ec27e7d536fd4. 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/BXC3A2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b962a64aef6e5f86423f38fbfeb55314cca82ccf69c3382987446226b757c81. 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/BC6B92100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b962a64aef6e5f86423f38fbfeb55314cca82ccf69c3382987446226b757c81. 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/BC6B92100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c613d709f408c00a2aa7b0db623e677ed9414c5f1358049af75635b95097f35. 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/BC6B92100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c613d709f408c00a2aa7b0db623e677ed9414c5f1358049af75635b95097f35. 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/BC6B92100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9a28c085768fa69909c35c75e5578033ded01cfd54daa254f725e72840e4c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/BKCOO2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d02e69dbe874964dfa0694040cdd37163a5fee54ead89e301b9b686e2084b0. 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/BCDFI2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d6ef301246648beb06dd2cc87817d85db1ee54a0378d49096a02bf6d8dd47f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX60J2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba12a43e18ffedd86d6ab642169724b9dfe0e909d320dc00e37f51f034cb00e. 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/BXI3F1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c850058f08a1a8351b30c5e80758f2db8305b30b8bd7e99ae9b44c61dd0683. 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/BRSME1801039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a330f7f559c545e67c4b07001ce5c658b88754cc724acbb47fbddab7357edf. 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/BXBB91700018.