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 0xf9861a8f460033970d5cc68f17469e6ec93a5796f8a99f32b512159b32642d38. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64d858b3-44d5-4063-9cfe-a2f3c4e1ccc1.json and https://artists.proofprofile.net/proofs/artist/64d858b3-44d5-4063-9cfe-a2f3c4e1ccc1.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 0x3b620180143b726785de131a5b67c4ce031e407bc6b5d8e50bc58d162aed0ac1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DGA092353612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5900d97d29de1fa9337af92020b44f4b060a9fdf2f9c870b196308627288c8. 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/DGA0H2319027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00382f3974e2a1a3a4732864f590aa00cc8ee2c55e674c0f6cb07b5475e781. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DGA0P2304407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6322b8bc97dac648d990434308ebbc4544d3b5ecaf747e1746287ee6e7593dc1. 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/FRX872423655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206270be80d2d1b1633ac5506e36f2213ce796bbfdc56fa96857f76d293e7d60. 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/DGA0M2466296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba271d369ed92c3133d824cbdede60c4faecc09c4cfe613f13db7cf78d4ad87f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0L2449161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9077715f039bbe7849cc3d5c55c2cc429ddca40ee608be7998acd1d5e3d12883. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DGA0R2488214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b5e9189b5b06ecc506006e346808a83f7e733d71cf185d60085daae6e9555c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:22:18Z), 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/DGA0T2437169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f253c21c68ffdc77e69b039368fe4e23ba73cc95d4c571d0dd28d03eb2699b. 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/NL8RL2518833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ab3881201ab80a4fc56fb2b071e667ea3ad73a3e45297b6d5158d18f53c59. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX762575713.