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 0xfc0b25612b8efc6f819bb7e7733801a7797adae44fc62fa1d52d14cae96a381c. 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/84d2b5fd-792d-4263-bd3d-22647874ef3a.json and https://artists.proofprofile.net/proofs/artist/84d2b5fd-792d-4263-bd3d-22647874ef3a.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 0x3b85637b809c44f8f789ef276145266a13c0234ee4bbee62eda90c91ce812294. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:12:12Z), 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/FRX762347033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4de49ee30583edc02efaaf8caa4afc4094088afc70eb76d31eb0ba46a6e7b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJX2397964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90c0024dd27aeef4126220068f9c2c7469c888c4e9a837dcd73d4095d11fc4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUB732059957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0071d07ddaffcbb21cbc6e846a8896d6b3f45ecce76cba7ba2bb24a6cc3a2d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB732051418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a636df70d55622462215ad6901448c745c0dbc40ce7b81aeaf5e5a831a99a7. 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/RUB732061149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf649734895db3e92cd9c9d0fce50846ebef86e61c68718d184351a2d77845a64. 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/RUB732059951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90c0024dd27aeef4126220068f9c2c7469c888c4e9a837dcd73d4095d11fc4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/RUB732059957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427c20a59d7b554c103a04df61e3c54d3c3d35deb5647340ae88ae7fe80e932. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUB732061145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cafc7fa7be0f74b1027de4c4e950b8c6cbe04640191b6eb2111aeeb950b99a. 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/RUB732070906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ef0d14fcf2b5add99ddb5df986f9af5be22406d30cf0fb0b6df6574c041d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUB732059953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdc5a1edf26164ff730b7345056ed539d09ba7a556c5d07eee1be4c49a3afb5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUB732051414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef12e241034e24d041c394aff1051a546f8e6bcb7196251ee38c802fc7f9d97. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:13Z), 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/RUB732077327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9829b02d38606d2f21ee08092a52d35e49489b2a747e723f0d3e880730bdcdd1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUB732077333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c642e5e4de2138826cf51d81cffe25ff86092f1f07cb3f406a1afcb4bd439. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/RUB732077331.