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 0xf94f61baa11902edb735b72013d6ebc094572744d184530a005cae11d96a02e8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fbbc72a-67a2-4a73-b4e5-5668e49c6211.json and https://artists.proofprofile.net/proofs/artist/8fbbc72a-67a2-4a73-b4e5-5668e49c6211.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 0x31a3a44e959f4b3bc19ec379cb39e5b62632dca5b2c99c79d5f93a5a681df0e5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEM1966135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b03f8154137b5241edad8b8b555d2d848f9e0fbe7800bdbb25fd72a4fbad8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAEM1966158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ea51d765bc7d77129348c5680cf3bba5e8d3abfae54631b0557d9baeecaf56. 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/TCAEL1958902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea0eb75276746c52309fb4af3f74c6360637545bed3fa283e20fdad1b65464. 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/TCAEM1966181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e0ce7d62339cb0b47b98950ec82122748b3f3c1565811abd1a5ae436e7cb62. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022002460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcedeb49361d3acd61a51771a6249629fe1a4a8dfa5e74c9a569b535f5372a9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEQ022002451.
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 0xd530d59c0cd7a71a58170e075a30beee1a9793f04ed2b02f90dd4eef28d7ea5e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ022002454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ddb5fb78b7bdac836aa102d0f37883a1697e8b70f2f6738e5b5ce063f115a. 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/DEQ021906470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92462975aa3b12afaf9ef405674bb404e544c33fbc52b599cf2f35a15b3a5818. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ31943114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046f95e9270309a2381e7670d87ac9358ef37013799d53161c185f046d37d047. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ31943121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813e5eb66fe49e8a63072ae7b78e0cd013b52b5c8996c32158c8b754fee0d9f6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ31943113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b78b6716714e3a70e8edb78a6b6ff996e5f86aa6d8642c612189c4ddecd84c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZFZ31943117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cf954c66b028464d64706755d029a378d5bce08417bb3581175139889e5ae6. 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/DEQ021900658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087b855060e0baaa7e143e6fe23efc008ea7d303fb47454257a02bb5d2ae2a77. 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/DEQ021900659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2898661c3abbf6f551e1875d1b6004b15a8b55853cd9739fdd90b725b0d994. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ121754030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc157eb447c42b12e70742551cdcc17f29b85501e094c8052b17d9e147eb90569. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:09Z), 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/DEQ121754035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aa6e918cc26483d47b82915f565f13d63bd31912b820cc626f2ec0a4ba4e77. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ121754032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4461ee8baa48a7b8e4f0586536e91a6f78b01834341e5bffc4269ffc097993f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEQ121754048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70b444e874abc9059fb89cbdc3c73c3b9057d11050d40d51beb5fe735228d84. 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/DEQ121754049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091153cdfd0c6a8da2ffe39d624403f842ecc5c20b211a3854ec2907d5dbc473. 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/DEQ021800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06009c267d37c22a1d57ee83be154583213ee95a456377201b0733e040874f4a. 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/DEQ021800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6cf123b6610255ee5048d4cadccf53e92232637d786d3b1e7cd2ea7aae0c63. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:25:39Z), 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/DEQ021800923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234b682df7fe21ba4d25561c949ffe0e7cea776b8544142456d13fb75b21bf1d. 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/USANG2082308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7b76bc0abeb166ad5ed8c8877f7ffa3844e10a9390ba8243f16ee9cfc67d20. 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/DEQ121744746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e008e760955685af99a52198512a225d81cdf7698243d9069f48104bf330f. 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/DEQ121744747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3336b1411cb6a372e99668cb798b0e15cd6d4283b1ef74eb6a19d077d0c1110f. 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/DEQ121744748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c1b30027abf32703fda3356bd7817cbe2275a67e9cf0ec8bfe4f14b7f6ed8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ121744749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2098b116d399f25014f0a039082cdcc841b0ace53f83446417668049529652be. 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/DEQ121744750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f6a08de6a24e345c6ce4d4a8d618e7d1391d6796b466bceed7fd54075a4a8a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ121744751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a61a12877e47e421b38fefbdb0949704eb969b4a7b409ba0df9a666387c34d. 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/DEQ121744752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81acabd6adb3e4e13164e0c825498717fdc559a8eb98201bf5299b4f9e69957f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ121744753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07b924610ef5c7b24152d8b1bb2e95ed7b4b7d5d9c6c9d806ad44d13866ab2f. 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/DEQ121744755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8925390577372e1d49b3b0ebc7f4802a54f0128bf63cedcaf5e54ad2f2fa7b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ121744756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3634a9780522f4aa50cbd1f8ff21f2a06d2c5d66b680313d520c1c9e2f0a303b. 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/DEQ121744757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0007a654a6163cf4f34c0b98658b98e46938e640df0d4a1c21374fb3fdc7c4. 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/DEQ121744758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6dae9da009dae5035755df855344ea0b472364c862fff060fb13b1f080d5e. 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/DEQ121744759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db2ec282ee1d669059342ba4317a294121096e2a6ac907e7777f477142856a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ121744760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112f8cb1ab059e3704143baf70ec0faa689898c6818a81614bd454d4595f17cd. 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/DEQ121744761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef94a0d3980dfb740686ca1dc4e8f68d5684696475b657d1ee4f5f5efcea5f06. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEQ121744762.