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 0x2516a61eab0e326bb83492569022348ba63783d148a2c38cfea270b03bcc1417. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0d72418-3dc4-4d17-963d-76315aa58327.json and https://artists.proofprofile.net/proofs/artist/c0d72418-3dc4-4d17-963d-76315aa58327.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 0x5abdf902de433543b14af13c1287a9baaa7ba6713317129b31dda27f6d952abb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:15Z), 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/TCADN1889663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d654ee5e17923339311abb5f5e109b7f98405735c2f3e0585969bdd4491c7bd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADN1889665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1146d7fe24c9ccff1b000a86eef452bc1b15d10bb1f0ecef86b1730370064c6b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:21:39Z), 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/TCADN1889667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61fb4178888de96ae4e6a3f6078115d1fec8144866d0afa1ebcd0e7b19e23cf. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:03:30Z), 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/TCADN1889671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7b357da08b398a2c5da0e9a529a2796cf13a0990178dd3df6b55f78dca566. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:17:44Z), 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/TCADN1889674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abcf0e45275199e617fe53191b2914c5cf195eb637b250a85d77a3a46dc8b9c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCADN1889676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df3eec56f941155ecfea38cdd23d1fd279222a6287651409b21f4219a91702e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCADN1889677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ac95bb09f5c7283ba87a00e4af0c4f13fe09c9e65e6b6ebe302b40246ae7d4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCADN1889678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21b9fe8c82b7f1dead308503eda75fb72d27ccfb96f67927913a9c041d9df6f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:18Z), 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/TCADN1889680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdd5b83f68fda0abed577a0a4e54d5e9c36891a326174d01100ee61ba9e5e07. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:41Z), 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/TCADN1889683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f5041a037286d0379013acbc0747b3b04ff2384a8c5f1fa5dae62c0521f193. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADN1889684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4782d8866fad37d51d0c7ff676ecb2b4afe47a9b5086ab2cddabb88c464995. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADN1889686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384c7d6707906d01cda5a1b12a762aa9cae035619ff7c1b07bdfd17ebb0ccaa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGJ2226986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b950f66626db45faa96528eb8dbd73f306a4f4dda8ffefaeca1fc286d6647c. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TCAGJ2226989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330543fe342afe5f2f79d524efdedbdba1ddafd886095cd38a711abd628fc45. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:21Z), 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/TCAGJ2226994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe205503dc3d1c1eb500122ad5135abaa34b9f67b20960d260fbad8a72e014006. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAGJ2226999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c7913dab72e4d1b6e4d2b2135bf7b25b64e45353d8f02f8608f6f9dfae265. 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/TCAGJ2227002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f96aac6d696b5f18bfb3bcf5002cc4e81666fda6095298e4fc4fa82604f585. 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/TCAGJ2227004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5175bc38cf3db8fdf29ffc740edcfe9f60dd863516adf910540516ee7d5b1700. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGJ2227009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0453f3a56b67dd8f6fb0175d9613185d924935d8b83e3f5376099a4b10c6cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGJ2227010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cda7f21fb82a548f67763a8de4934e6c1b46c1c943e52a198c6f3e03b7cbb6. 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/TCAGJ2227017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28438609023bad61b4af801fd6f8e1429c3598cfb79894ab354fa45d2996b693. 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/TCAGJ2227019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b16c077d0d1d8ba999c9c1d22e89eaf8ec5a6c77f8e3dbfef283a390d05ad. 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/TCAGJ2227026.