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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f85694f4375ea45ace90bc3d4f7ea1c6b47250c1eaa6290475ca0bfd62770. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cb7dc48-93d1-456a-befb-c82571b628a0.json and https://artists.proofprofile.net/proofs/artist/3cb7dc48-93d1-456a-befb-c82571b628a0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0340e79605e5db95310cd2b6197092bc3188d08f3881e803ce6f0e9d883160c. 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/TCAHE2338165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56c8424dc74403c25752f07d3d70ae92d395fd53b389a3a2055dcb71510a7f7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:23Z), 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/TCAHE2338175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cfc2986fb7fd797ff5c96107dff7d21b17bdd3c79434c842256453b8b0f482. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAHE2338180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40919e350a5b6d63ff21ec5a7bf8c0d7743cbfd9a6b75048848e732299d6c7ee. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAHE2338188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3fedf16086cab99ea4bbdd2c997bb96c926ea90c6dda4ff1fd87d5e1efc48a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHE2338190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d66435970b13ac62f32e4e528543da10eb6de51873d870e87f3433e71b9d904. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHE2338197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9a6d2b28eb08a1701326f93fceebeafd2bbcfa56f92033599164450469fc68. 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/TCAHE2338204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e651f86299135de1f630c62aa2258e869b9eb52877ab27d87fa0281c4da228. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHE2338207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee18564a8e42fa46bf5d70f73c4f331db95fa72d0793192c39436a002a4ca34f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHE2338211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a9ffc53e00ef726f447fa7101f44ffae7511ff8a21e3da34d5fcbf95d4dd4a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHE2338214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f368e77619c61bb951abdbf7fe16c63f878f6883a86229dffc3d0fec52a916. 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/TCAHE2338240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaed44c1da591e79fcba8e8bbc7b16ef4853d6f591eef0c8ed718eb980590656. 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/TCAHE2338217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181943e12fcda981a1e20912f02a202e2911240e08495e184f26f19dc0c53cba. 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/TCAHJ2317137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae05b71e2eca36793e4090571619c9540a60c77800dfedb2cee9ea2d49560021. 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/TCAHJ2317034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3618001b06ce566eb0d09b27e0baf118c9b10464279a80ffbc430ecd4a671e82. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHJ2317067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b98f31d4f4a6c498ec409d705f13300245580146a3fe11efa836889abee73. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAHJ2317194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb35b5440241ec8eedfcc8df22c035df3824b48643ba6fc77c811eb2d4d770. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHS2351717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde7858ae4aed17e5fadd864a43917f9a08199dd4981d2888e0d6eb1a04cc73a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:57Z), 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/TCAHS2351719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccf466ad3703e6e5bfbd72796e18aab074d32d86d29e0ba80f8a5e24bbcf921. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAHS2351731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafb38f14dd31544d00c604696a9634174e8a2ab19e989bd468126914e2f70a8. 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/TCAHS2351733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267320cd6aadea6f3afc26db6c4f3a57bf84aff6fecf017f97032ef274375c52. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAHS2351736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbffcd8defb61b76437e1dc914aa6c49e6bf72b5858813824c5f6221ee57d6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHS2351740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e294f157a9a4772fe938a27fe22248614c09e63be62204a02c3b96a274d1e6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHS2351744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6e5fc946229bba72b5761f3d33b723e21f1bdd1a653c9db7003c638b7ab85f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAHS2351748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30cc6b0f7c4badd1f9d0935c507ee67ee419e6c93226bfc536b8628e69fe949. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAHS2351753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d0025fe12ffbbea2afd2e77cc8600cc9b092e0670358e2278bb78ed254b0cd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAHS2351759.