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 0x279b6b07fa713abee3e5c7474a3d79acf164305859ec01a4ff9313fa74977143. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/096a71c5-07e4-45b1-8aac-a3999a3021e9.json and https://artists.proofprofile.net/proofs/artist/096a71c5-07e4-45b1-8aac-a3999a3021e9.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 0xbaab58fc69f0f67dd6960c740debda13e4973cab09f12eaeb1cdac466776fec7. 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/TWCW71809005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66156114d73c4f97fe8f0a6699f843b663f9cd740a2082da3db8b316a4056946. 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/TWCW71809007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8f92e166bd455e3c53a31e3337b49b6d8e6934574b3e13f16decdd182f9a2. 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/TWCW71809008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211db5e609c64e930e6fd68b31a80c38a872bc7bb5cab5edcb2469a8569a8ca4. 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/TWCW71809010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb735c1dfc9946653ff0fa185851a3491f50cb048ed0554540056213fe278ba2. 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/TWCW71809001.
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 0xa147881d9c74fe5719511da984854df90fb2701e51529eaf44fd07e985e0cdfc. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWCW71809002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f511c1aadbdc8a5ea5f3812d55e2d8656e66b360b4b88c009d9ad4dde6c3158. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TWCW71809003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75838ea564769bdd8a33d15837d870aef01809377f010469d044d969013c63c1. 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/TWCW71809004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaefc88fa2b3052362b4b1c0c312aa3afcca58c06afcde090e07c8d618e46993. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWCW71809006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fda32611f88e3bb9f8597216bd0c7a825a04d865308589e92a55d408ba6f18. 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/FRX762062415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f5ec3d5ba77581acdcdf0a82a95b0a606f75ada931f08c72add1774572bbe0. 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/FRX762062419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4ce52e64c69b4b9d4c945e91db1cfab116d5b64936c8e66166366ec0b7771. 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/USHM21640624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40d49cfd6b1bf79e0df36adeda386b1a1d2cfd25c868291a5cae1a7eec9a0e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USHM21640623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbe58568f961ce9b35db568d1e95b37e146fdb461245c77d6278cd256834eb9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USHM21640626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7852abba479bf1481ad6218619c68ae32d756d59b110d3359037cedc9b3921. 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/GBBPW1900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c64d2f3f2c5fc3054af2da121af8765f01922d97b69c4f7a581f05113ffb69. 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/GBBPW1900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0a6adcf3491f23dc73c008a78866f23fffdc492b1da1f143c2e7fced34b58. 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/GBBPW1900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f28dd6a5bcda67af30a5781aa4507b94dfb32d79351fb12660f8b3a6a01f4. 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/GBBPW1900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768ad7037f9443ba030dd1bb03b42ea638fabc7c852bea7c0bf0795af098493. 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/GBBPW1900139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9b23b6ddb1bd9e279792cc0acf67696859d159d51e5da363aa02f53dc71f33. 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/GBBPW1900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee17dd665e39383aec13b30c5a4befcaa34cb147a8c7e9f14c4de4509d025b4. 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/GBBPW1900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f998f8710db52a9a53d8a87df4fd714854de364ff74e9e45175320d34ad364. 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/GBBPW1900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585d698b4aca1666bfef1ffca2a2971d7cfc46faea928bc0d95ab0be3e69304c. 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/GBBPW1900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4047e8bc16c53f3613c37404acfa47ba6d4c768659bf158f964d1a6dfaa227. 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/GBBPW1900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb98e065f975735fbb5e497d086646233ea1481b309c81eb30a5e8ab4d1174. 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/GBBPW1900149.