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 0xd3c4c63dc78bfd53975d1ef8fd8e8d4a1e7b56149c0e6a1895c784a390ff4447. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea57d0df-ee18-4429-a27b-ec2b7520236a.json and https://artists.proofprofile.net/proofs/artist/ea57d0df-ee18-4429-a27b-ec2b7520236a.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 0x88eeb03ac306815bd851bd544e6d4f594b5a160b1e9df63d3117ac9bc36266f7. 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/RUB731421523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea56cec59e807064aba67708f9120985683793a10ad0994bdd6c6e992da57a1. 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/RUB731421515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020490fea32e0e237f1e70071f22a6134de0603d4c8e65e0008c8865a4bb6397. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUB731421585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47773a322cdc9717a63611e4c0428ce3911d41908d24348fd52d98e5678dfa21. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:17Z), 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/RUB731421561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a2a6d62156767d8f2262dc98b2eb8ca3719bd55569a8fba1126eb39e672284. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUB731421584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39ce664340ef8b8ad4b5181c48f7a056fb84d76f1ff78c1986b72bda2b8bac. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/RUB731421493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0020c8ea5f4cf919a9429ec37f5ccd2dac426e3050e610186d9b0c0b440a1da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUB731421531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c9f6939f5b57ed6765a787934f1c1fadfe3a1f46ed216b0b06586ca63caf3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR6V81557376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2385b261f531e4afb71e1d4a459343e236997f28da3afb49363514bc4b6abe6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:39Z), 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/FR6V81557379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d7190c498d3ccd29eb537772d6beb886d2ec4d50d989ba1d1544fe877473c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR6V81557381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd3c617fb19c6d5cd7e2b45de4739767bc6a8e02ccf90a3163ea3908b16939. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR6V81557383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39733c37c7165b76bd857d3ec6a6777b85d23519e0aefeab3ac6ad8d49221a38. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR6V81557384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efe51acb7db78b57adea7ce4f031a2b0065e2bdf5a5792e899e921d29c22d19. 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/RUB731523946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede1b27ff5f0c2d77bd653f49a3536a7d567b86fa4c9632b0f480d171cab0dc. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUB731523960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee1f784ed7506ea1491a2419f0c25a1526f9f0203957aba36bbbfa390d09a31. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/RUB731578097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f8b9f9bc3bdb026a49924133c5c3cec38581369a030edd0f12572d1acefae. 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/RUB731594772.