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 0xed55fa765e1dde49e60dca7f2e8e58d0793430ddb97bf1b1108e9dc1c7afcef4. 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/385a5b9a-7f5f-4ed8-a4f6-f02742a06a6a.json and https://artists.proofprofile.net/proofs/artist/385a5b9a-7f5f-4ed8-a4f6-f02742a06a6a.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 0x103cc06d8081fc1b08ff06cd367aaedb499a103187e6c01b2b5f6d1ed979d668. 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/QMBZ91528001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7901729709fdb8d41eca397396bf9b179af5956c5b483b2e6d05df2626be1895. 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/QM6P41710261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32215f352fac33089516790426125cc4da05cfce7aaacdd6c48494809625230c. 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/QM6P41710262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6430b6065c7892350f7ec3919f83e486e4ba434792cf85c080ab45384eadb7. 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/QM6P41710263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c5d196d3ae00633612833fc6c9bc0c6cd0615c055adc4b2360a46463269e9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:58Z), 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/QM6P41710264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e37465bc1e5869ff87fe224fb3f6d29073ab092f6f4edc399e5282ddd4764b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM6P41710266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c8af0be89d1f2f0140aad54920301715c225a92d64f4e4937e5ecbc718d7b2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:55:22Z), 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/QM6P41710267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00895c8ee904d7c6ca3d42a9f81bafab3e373ff467c521fafc571ccc93afa7db. 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/QM6P41710270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986292e74c83fba770b730878ec67e3bc6e951659798c90440d8ba71a28cecda. 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/QM6P41710271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f83c55bfbfc4bc11cb0a847afc3b8c07a34326691fd3a3db734b6492cd14a33. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:24Z), 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/TCAFA2047937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb84631ca32f598b91189455555ed9903234a3cd7206fb865209a59bed3d107. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAFA2047940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d83de4114f29328e937489512f8f649c0e07762259dea9991d66fc93791d63. 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/TCAFA2047943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5760b92d150b6f9f9b2769a1edaf98f27ab0ca745b86250217793de967ffec. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAFA2047963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58ac68f2b8fc33ceae35d1aab1ee2e0582aa9685bb8f44436ffa0dba77ffbd7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:41:48Z), 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/TCAFA2047983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaac19d811cf3e2bed78ea442140c39b8e77be484bbda5f9f77fd29aa731531. 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/TCAFU2165852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c801254d5245272b51eb2dfe671904e7b081ea4814607d8fb4b387755360e2c. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/TCAGU2307203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe927f02c12acc2e3df2b2e08b1ec6f9837c18efcd62bc4c454f5a00de92a37fb. 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/TCAGU2307288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df17c02f0783143f14ca7ad75764d178fd7ea52aa1d3dea8d0d5c4fcb44c1d5. 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/TCAGU2307312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72258784e1add36ae01bc9f4f902c94660e79a698dc185557105ddb2e9c37dcb. 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/TCAGU2307316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3a862518819839b142360e385edd35212b47054bd64b7b1b80edfa92340010. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:52:59Z), 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/TCAGU2307321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac6a1b3d3f26c4c9119509252a431daf0f3359978e98335570d861a25d64633. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAGU2307350.