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 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 0x6e85533957b3c5188035d76cf6ea97968b237b83c4ac544d373e4b2d7bc68c1e. 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/fed6a68b-96ac-4ae4-ba48-e32be13709ad.json and https://artists.proofprofile.net/proofs/artist/fed6a68b-96ac-4ae4-ba48-e32be13709ad.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 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 0x716c76d1150ef4deac7f594bdf84c36b9fcbbfb3d9894bd512bffa5c730552ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX021500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d376b17cb5fae12d8a1d9979f89ddeec17539f03843c70a25c83502414d4f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX021700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50124c5562868746bc845cbbc8df83a380c4e37c74274c9a23d72572f6d2535a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX021700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1024ac5572c15dd041550c77891287737a77b47c6a097f44d92b6c1fcd324. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX021700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dcefd197d5fb304bd7fb578aef3a0081c6dcdc5725d485f10b647a18dde530. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FRX021700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9fcea6bc1fa2a81be28fd76dd2f489edf6e6573e65edcc828485b72d71714. 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/FRX021700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9404345652648a9052bb6cba0b51f7e74e2374317b4499489aa4a7f07a0f0f2e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FRX021700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5abfbb60b51f1a071572aab0440f3539f7fb250d45fd053ca361a8a0384b44d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX021700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226e1ba8d1d1dfa39bf41dd68ec62c355f68e7ba923c9066a7493f3453c60119. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/FRX021700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecbb7a8b53399c2b88e37b212986019ee5bbb4f28017b196b0ad074a90b141b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX021700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2763c1f9ec9b5f2d366b604a87944064d9052a70d48808bec4f1416fb8a5f0fa. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FRX021700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67458b22440963423358cce29c06ad83ff4e54e6c60f9e118fe716e9ef443ca0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX021700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db569aee84a5aee9ef9dd32bab37fc245b9a68b00995c9f622ad921ac9f837c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FRX021700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50124c5562868746bc845cbbc8df83a380c4e37c74274c9a23d72572f6d2535a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FRX021700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dcefd197d5fb304bd7fb578aef3a0081c6dcdc5725d485f10b647a18dde530. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FRX021700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf9fcea6bc1fa2a81be28fd76dd2f489edf6e6573e65edcc828485b72d71714. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX021700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9404345652648a9052bb6cba0b51f7e74e2374317b4499489aa4a7f07a0f0f2e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX021700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5abfbb60b51f1a071572aab0440f3539f7fb250d45fd053ca361a8a0384b44d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX021700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226e1ba8d1d1dfa39bf41dd68ec62c355f68e7ba923c9066a7493f3453c60119. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX021700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd196d378bb32b9aa3be4be6b1efcfed38c22d63431bbe056adf95681b8223764. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX021700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecbb7a8b53399c2b88e37b212986019ee5bbb4f28017b196b0ad074a90b141b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX021700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbe535b243349b784408b70fcc4689781013b4e68a5017e1401e8dd4b7f251f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FRX021700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2763c1f9ec9b5f2d366b604a87944064d9052a70d48808bec4f1416fb8a5f0fa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX021700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfa66d64f4b63b741af4f7b1aa97738073fc6d2acb9070903b86d7a1f231bac. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FRX021700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67458b22440963423358cce29c06ad83ff4e54e6c60f9e118fe716e9ef443ca0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX021700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bf52738a374798a7d2cd0fb57e16e7853880e93a96e7c6526cf63601082489. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FRX021700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db569aee84a5aee9ef9dd32bab37fc245b9a68b00995c9f622ad921ac9f837c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX021700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5339d0e7b3c4b1d9eec62d2a2d1b916ca6bf15e6553fe7f58b56833116013521. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX021700217.