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 0x726028caf62a3c0ef4bb48ae4239b5df69c0f3ea01ece136c9c803f8cbdceb5e. 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/94f73396-3765-4ed3-8301-234859440b88.json and https://artists.proofprofile.net/proofs/artist/94f73396-3765-4ed3-8301-234859440b88.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 0x5740480e756feea57d143255e663bcded032e51f549bd353de2c70fb1cf7a8eb. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEWM92111551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9801c268e97a0d1d9f8721234097f09060623fee2520fd7b620e5430c1188a90. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEWM92111552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82103c30e50494aa7581b24d71b5b854ad3dd9dca7037e25976433f030fdae0a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEWM92111553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9df909a95def5af9d010577419bce00928c7a0704c2a89148c75194d50f918. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEWM92111554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0849d39ff923d10021b6f53e3f15243dd5be81e18352a7f48bbf78519264c68c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEWM92111555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606e3352344f9f09eaffb9980d80ee2f6f8231e17b713c20ce967a9d881db9fd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEWM92111556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc75b321f8e338bb1a5aad068d9ebbda9e8e851336d9c65ceb2418b7137e5a70. 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/DEWM92111557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a0f7335830cc3e3315be87467ed37d754f3072fc0045d730bc2e3e8c282a9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM92111558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c11e0fb351e250d2e7e7292d81ebf0137f699f2261a1c6fc040686300c123. 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/DEWM92111559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc3d8e9cb59295468cf1f58d9bde6f3f6c3ef19d7daeba6819f1328cc7d2685. 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/DEWM92111560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5205739d655f564aba99344fd01676f75b1e584a942ab44ba233bc0dbd5a701. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM92111561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7bb1c1a9d01149816c5d6370360d277225156fdef30c372bba8173ffc4b585. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEWM92111562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb3050d88fafd8e6781b6ad958c35be142ad811ebb7103795c44e58fc37720. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEWM92111563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46738210437a4370564427694fbbaef8207ee890f1269b9b30ea250ea85aa978. 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/DEWM92111564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e8ac804e85cabbca90ea971fc4468a2e236fa3a9ba9a7ac2bca9f715e7bf81. 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/DEWM92111565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4485d99259e1255397f04ec06b80fbf7d1c3f95b05f5f912257080bb745566. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DEWM92111566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd8784e42524c42e3a2884976f6b15b71776ed81d3a695d74cde9409ddb132. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM92111567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2614b5eebbc2a638393306315d4d57dc7ac505b9233d8c9d12182a39b7d90681. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEWM92111568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4707d8d1220638389dcba326ce0aaa7f41e47d0902228f8442a6c01a72081cc7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEWM92111570.