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 0x19dd18258865d328fac6e1f3b6788ff72669005d5f88500931064160655a8980. 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/7d615da1-409f-4b56-a156-03468423908a.json and https://artists.proofprofile.net/proofs/artist/7d615da1-409f-4b56-a156-03468423908a.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 0xdc78507a21988d77f6151649fbe018ac38398d12026def6f5d214a4325e4f5f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRACT0400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28a7be4d76141fd34a28a032950f66452ce3a2de90b7ce331a93e2ba871a761. 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/BRACT0400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3f9ac3c14a461eb1c4a2d6be66e90d6d3c4f613e70d6ed64a5c09133e28f21. 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/BRACT0400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74350027bda56cce74764f60459957da388e336d10081515ba18727edc358d79. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRACT0400402.
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 0xbfffb790b984d2623adc15e2ee969405de05815544579c9b9580fb915f18d991. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRACT0400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77305a8da074582c3a47105425655432be784a2ece3d6867ddb624db3f410a30. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRACT0400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d7a13502aa0f7fcff75b956d0c7cff0b56bbd7738961a7a599aabd91d1374. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRACT0400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b064808f6a2ddf087d6175b20e6971edee0e28d188d0b877743b37d35ca7373. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRACT0400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7483feb24ef7c246c3e65e53862ba34912a962ad4e9898ccc6882ca56b964a0f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRACT0400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb382abf7eef1a6ad2e94e6b258411eb1b14a8409c42bc5fd39a04dfb172ff4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRACT0400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8ce8860f2fabfd146f776c9efbc2987728d50c9d8291de8200a2675c859b66. 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/BRACT0600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fcad824be636bd5bbc51f4e33dff0f585ac6aba1d1e48e21c557b0d42485b3. 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/BRACT0600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce15eeb96a968b56d4ecaf012df85bc4606332c83cc228ef44eff9b1b25d327. 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/BRACT0600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb870ccca2ddc82a9148d4989d0628daec10c8be0d64e2306723004e44f998a28. 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/BRVLS0000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b0c16a01641c997a2d9f672c5c066e224cbace3bf7ee3e9715ce4b642ef460. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRVLS0000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03734747d986bc42bcc44bef198d66cdcacc5ca02558d5c16b6602f522c0cc1b. 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/BRVLS0000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d78688390c9f915b9450fe1ea8cb257f3988993cbd92faafc50c12dc55a26d. 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/BRVLS0000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0ebbbb43b2d0f48677949ab963fed2b4493807587e40b15c12c1c5f7d62059. 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/BRVLS0000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393c644e76b9ba10ce28511bcd24ad172b35705c5cefc6fbe78349fa4cc5684. 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/BRVLS0000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523ed2490d649babe3c046df62c3323769680ff8b07b2507afff7cccfd0b793. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRVLS0000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547b19cb614be3d45fe1e38e161fc23dc291bb01e3fe198fdfd818ceae9513fe. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/BRVLS0000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8490ccdd2b68fd43fbf52c3325cfdbce0b65de49bbafbed212ba864eee8890f3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRVLS0000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19daf62c9e5256a07d0b83e0a87fd39de448dbe8dd7636f5c8dc1e52099195. 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/BRVLS0000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c035ad4249f81f2d61aa1cfc8a0a470e584f4a9a0bb178a2ad1bcfb37e43055. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRVLS0000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aba459b75b3582b73892742941dc1d2a753b6109464823c340b4ef526f2ec8. 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/BRVLS0000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a23f2da7d23218bbe9ed020eebe2a1b120869f5aa15edd8c9a832f698d34ae. 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/BRVLS0000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2273513a2aca15fdc567d8e0f941ace309e28ccab51c0aaeccfdb068a9ec600f. 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/BRACT0400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5ee347e071520fc1d9a8d81fe933cd95725b5627577c032e3262b3f48e9558. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:09:33Z), 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/BRMNW0700038.