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 0x07e3244224a56a267e9e4d0cb0f4f35226ab2961ea3813476741070be9a70189. 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/8b640200-d43a-4f47-8f43-3870751c1c3a.json and https://artists.proofprofile.net/proofs/artist/8b640200-d43a-4f47-8f43-3870751c1c3a.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 0xdafafb97efc9666adb8d2233a6f996b404f69ab3b39053ea3a419cc156af2727. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AREA12401058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bbcd921e65740b20e47ea4a9aaa9f855049d83a1f346b31f281fcb64a37268. 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/AREA12401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630a3246b5bb224e7622b99666c1301c1199408f4d1dfe4858652811fc0a0ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AREA12401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7255ca19f002425c3cbbe215e99360e0bded21b88651e7911c834dd3f1ff19f8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:36:34Z), 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/AREA12401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34504cad952825d2addf6e3e4e6593a773fd446f5103dd0022d7c5b6ae1729cc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:52Z), 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/AREA12401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f12768603c6e6f08dec43bb95e1bec33d4df6e2b5e8529bba029c656888f62. 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/AREA12401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97334e33a53a7df7d210e14cb9f363be22c42281759754c71ee681b4b8957f1. 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/AREA12401138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496cca6f8b9a9e7c98ff4ef24d3d606f9d7a6ba9df0e7ea69ed57442f23241fa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AREA12401147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993fe50b208f5603b88ab01112a2675e4ff15d3f2120ac6b4783785bbf632a5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:40Z), 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/AREA12401232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebabe3bf51e9613540cd41b2d3e1fa7165f40524af6313f19b7ebfd0af28d42. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AREA12501312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c066031f0d05a08a7c3007fb4e7eb4bc89695ec3d66d588f4ac1f8d0ef679c2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AREA12501342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf590041a80f4b96a512427e543a6e7127e6d5cf2ef94722c8ed9a01b7e13b376. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:29Z), 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/AREA12501365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c1f0df1d99c42a3bbf782e82f357afb8005c825e75c8e7d1368108d32d5e0d. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/AREA12501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbeff0f87b5d851eb82fed9553773eb965045fe96c698100d3a251d9c1e1df8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AREA12501406.