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 0xf006acec7823b652241d4cbb2804c690a18ca4c62aa5bdd053823b0bdef29f45. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7930a9d-396d-4875-aa36-70f224acdb63.json and https://artists.proofprofile.net/proofs/artist/b7930a9d-396d-4875-aa36-70f224acdb63.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 0x569231fa3def23e30dc0fcd1dda2fb7bdcf05eefee6d8e9896c178d24d065745. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FR26V1607754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf038c721448a41900fb1202c371c1ce4bb14e1935441a6841b87a5bc90760055. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/FR26V1607755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7617fb421b4bd8d636628b6c579e2666b4c7d2b838c038808e055af2c3e8f1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR26V1607756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919d0837279a857fc13fe7623f623e29660a16ad48cf8044f4baae52ccb5291. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:55Z), 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/FR26V1607757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b389e45f3f714843226f0d877272707b7aeec22ba83a3be3cc78beeb012da7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR26V1607758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4b14f401366adc4f22f2f747a8fe2d342e6a602c508d51534fc4bed06d2949. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRP621644220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadbb50fdce5d6b15f12d1415aa9bc2acc41247448fe9ce4aec71084d5ec7e41. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:23Z), 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/FRP621644330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a9bd4758fb3a483d2cfa889c7a2455e71ef9bba94bcf23ab4b733e981926c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FRP621644290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d04fa6356001c96caa97d6f4fb8555cd5eb54be628df5cf2c1ba675a0c920d7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRP621644280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1ad35a0d055f5deee907f28f3b695541fcd5b177e82c6e237f79eb83e431e7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:45:21Z), 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/FRP621644270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31319b03e9bd9756d00ab5e9c398576a0018bf878d2a58a7a323c1d75f69c3. 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/FRX452339485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03c58e7c320281f28c7cd8ff87b0446f68d4cd693f3787c96830fd819355814. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX452339483.
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 0xf7adf6e2ab64b9084425321f404fb5925bc5ad87301bd1e709d6c40018f15dd8. 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/FRPZ92332220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1ad63223be51ed1bb8127d0cb05863ab457cd33d027504bf5ec92ee7ca772e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRPZ92332240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517354aab512045efcc57be15ea0e3515e04de7a3e2e9f7ffc7bb72aafdb4b79. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRPZ92332250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ce51a57ffd81623cd73551160a712d3add56c52e3ff8c619be392eada52e15. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRPZ92332260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc598b3cdb1d54a1c75a85538ec93af8247a13cd60a8c2220a41bf34c6e3d51c8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:47Z), 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/FRPZ92332320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed76cbca407bc439e6fd5ed17b0798811c2c289cfb29a3f2abe7a6e4328f26c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:10Z), 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/FRPZ92332330.