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 0xaf2db12c7649f51be29ecfe29a0c25e210bc8fee53243512105052313fb55762. 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/adb47fa6-65b4-4250-b9bb-fa0ff3910152.json and https://artists.proofprofile.net/proofs/artist/adb47fa6-65b4-4250-b9bb-fa0ff3910152.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 0x113ec50318990a111b76e5ac64d4905ae3952cd60c3d116730452316ddad99c3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES6080780701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc32be7053a609eb973e5b042583c71b04e7a26b081dfc65d7a64a5b7d49fc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES6080780703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79b107b38df45c588c978ab1b0be17441049aa3790943295069cae781940bb4. 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/ES6080780704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ff0b6d567391d83e0cc3217d9e577220d50f494255f72f53f5fbe80fb7f6ca. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES6080780705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fbf39e6a38d842cbe678d4d92207789671938ed390ea21c5a9d82b0d49ed6d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ES6080780706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa205042b77c97dcd7521926305b8386fead364149c8c875ac14456cfc7667d4f. 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/ES6080780707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc789e20a3111c1472980ba87daf2b2886da7e9a37205d79a0b5354a2683929. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES6080780708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52361e71c2658329c179f3f8e9bd642fe98a608f7a67aa5d4639c19e4a31b545. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ES6080780709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a7f3b7a096fe8c6fe508994bd02a110b37d4c88cf4cf8592140486cda41476. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES6080780710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d411be41276b3f44bccc971ffd33b3e7ff292e9384e52e0d4b9e0113597646. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES6080780713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f8789b27c72339c9c8d65be8e1becfcece8791ccdb2d047dd35793905bddab. 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/ES6080780715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e3b9a530efafb596bb020b7164e998a6cc5b52d157ce3545a647f2a1a9088. 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/ES6080780716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c01abaa0e4c09027fa2c0aa4486f13e4d9cbd222fd22141c970c55bc7f864. 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/ES6081140909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ffa8eafad06930ee6909c71e379d169de0928d14811d07fbaa1f1cb61873f0. 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/ES6081140912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9e06e01a809cb7ab0e067bb609f55c14aa8bf5ef5d0e5627937bead94e733c. 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/ES39A1227006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea2a594f6606d7ab94d7eb04e3f99018ad6958ea100816b0acaa78379adea7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ES39A1227010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776217deabd28e6ca60365e9e83e4f749e52bbb832e8a842ed1a485c783543ec. 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/ES39A1227014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315105711612f328f18d4d481ecb74bbb731a6cfd413d815826ab1edf7912012. 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/ES71G1610160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f6d3bc067d9445e2e1a67d01f558064851f265be6890521fd4b90c264e0e97. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES47E2002190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf3208e98b73b0c421ca46678ace4337a362fc0491ac194c68e33c0e43cbbbb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ESA012042912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8b30bd03b5dfff1cb372a85b795f058b18ba80f9a784fd02a212fd19273aa0. 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/ES75E2200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a81a5b5628ea33fb6c016c903848d779fb8cf80f99309664fc0ada9e5315eaa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES75E2206429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e6f64c783d3bebb6a3de9dd32df397883c0295414c20c06a6d3a398771872. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/ES75E2300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ea6e2561ae8acd48955a28cc26209d4157a71247682ff534fec17f603db828. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ES75E2303293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36639061070bea4cdf28a47f686faac0239658dbaeaf10c84c61607f2cb29958. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJW2495960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b6658e574ded2e6281e9bb1959d1007c630ed77929996732facc8f73ab13f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB8KE2423615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13e75c71e05059537687dcb9050f058c19e300f931390a191420580802fb7c. 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/ES75E2508165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab0891d544ec43c8e818c3ed058d3d45b41bd29d315f1db594536f4d83d70ae. 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/QZNW72353574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5278d1a75ca1138fb91616933e7e9a21b99e783ec3abda9040d7e518442baf4. 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/ES6081641117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e58e56927958657c0322a52273529fd4f94c9d07162bd287ab7b728caf395ce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES64E2204971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d91773400d79ee0d8047fe8997f1ce6b0b95805f53fbec35b943fc891e28397. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/UYM123002222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce6fd5fe78fe76374705108f4e5e2fd5b5fccb66df11d3731f7e7451972c59f. 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/ES5370300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0378e7043e48e78d476c8c906b31f234c93fc728dec288e74542fe48621f998b. 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/QZFYW2082846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c774de6802a3c82d30b1d20d12e4c2c08f25629d05984a29417aa4a6dce95ba. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJV2009445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcc9c5ecbaa4c3887045a15e3450e0c9b335fc95f8f77247207aad90c0a372e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM21489339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd56edfbe936917381f5748500b96a0b3494007b8dbb7cfc8c9bb40a038f4dc. 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/ESA092308560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01102bf3067f5fddbfa8fb459fc7b64fb50a1474dd4f551bef739bb3a4f2eb6b. 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/QZ5AB2064373.