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 0xfb4fb817edf3f676dc404e284682cb4b54c031bddf4d1b18087f5823fb4e727b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f62535bb-a5de-43ef-93f4-067cd20eef47.json and https://artists.proofprofile.net/proofs/artist/f62535bb-a5de-43ef-93f4-067cd20eef47.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 0x0c60b046e240b957b694f0bf08cea9ca4cfb639dd14b97f2dcfe2f662607b656. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BGA472336665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff697c0e966e8e1244d810b484e91d0a10a7bbf972a5d0126b44789d7f3fe6f3. 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/BGA472336666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef4628e1079d29d0acf093c0a8868d735b7d43e06b72deb42b6c04a8969512. 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/BGA472336667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348860db7c82a3e7530ecf538453c3ef775533caa12b0e948f1223c8de2b4c3f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/BGA472336669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e304d2e909ff07b6a450acd6c31f3a83f5e000ea6e3f13adc22ede8d6ab31. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA472336670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7962b0bd5ac793af1f90209a833e04513374beba463c65ef3573260756e1bd3d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA472336672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b671e4344223e3a723e3654a2291962ebf27d3aacf72e55cd8125f7c00d71a. 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/BGA472336675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba68550480e1117748cdc7628d6b7a16e911ca28398a338a7d0c1c3f42046c1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BGA472336676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2398cd95811cae9b8803fea1a2c3f5024372660ba2bda32838a19639c33c3c3c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BGA472336678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa47ff4759c4e2b3629edaac20e296c63d2b0898eb2a0a07e9c454a26fdd0ae. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BGA472336679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e5ad9cd2c0f1573cfdb77bf420da2797b174a335c1d5942fbf3d89e23d2b0f. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/BGA472336680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db4f70ab79ff2a547aa27884864d17c1f53e925297ba9cdccf69838c025b438. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/BGA472337601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2e21c37dba3d16b472af96b95370cfe4a35224e9b57acdb35211c3fb73e870. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BGA472404625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f55ec369c6a308bd77eb7873d139491396b3c6f7f50cffb8d777222904c0c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BGA472404626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc77bd2d56fdcc20509e78d48c78e87f089138351f47234786c49135cf12b687. 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/BGA472405194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5345c5820eaac470c853a29f027bd87746f449460deab2eb32d05019e78ee18. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BGA472425777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f3488678e4032eb03e25517abcc55d49d7ffab67675e1f4a48dedbedc8739. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BGA472439045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733dc6fcbec3afda1d10fc21a5ac0966d9234521c666cccd30fde63ec0ee804c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BGA472438893.