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 0xcca5d0ee2081ecad711c84f0c7fef70862f48093c4c0d60bd3e8512e871efb39. 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/44f7079d-7757-4932-831f-8d26ee2a0d11.json and https://artists.proofprofile.net/proofs/artist/44f7079d-7757-4932-831f-8d26ee2a0d11.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 0xa4e03aba283c7b7b4cb0c2cdb6a61bf160bd8885f0e1350098b7c8b69f6a1682. 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/RUA1H1859769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643d38bbe5f08382fad9ec7dc4054b5289e28978112295c05bbdda4f21b29b89. 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/RUA1H1859770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600be723f432f71e24d5113434875bc70316d63d8603dbff912ebda010208b0c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUA1H1859773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cffd15309b88415290f04f8c75efba4f2ce1643346e30777d8638a71ae77b2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/RUA1H1859776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d470642e80e7a3fc4e23f2bfac32e738abce9637465f47b934f4dfb30d1b14. 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/AEA2M2118014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac377d96b5e868c8921afb185c41b600bab0dd068c6665864d08a115ff75bf. 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/AEA2M2224669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23e516d09c0a5c96b25a614d4c1bd8c2a911a7ada2301f70c2abc98df9ac61. 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/AEA2M2224670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dbfc91daedd4b88703c271ae11d95c2d0ad0779d9fb2af97a0c0660fd5cfc8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AEA2M2224673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a364ea42a023318df00d286e01e6aaecf122b159285a7a3b7c02176204d97f8. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AEA2M2224677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b3645660ba5b77794ccb27fdce3cc565cb0979d92d11867ab212e6de4cc881. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AEA2M2224678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f2d91a459282204bcb8dd71ed2fdb73e3273edda9fc58620db145efa667f5d. 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/AEA2M2224682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f65b5efa4cbd215c2e29677f15f331e26629be6fa6aa587d3725200cab913fd. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/AEA2M2224684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c214f153ef675dee4d93b0fb4e3cc8af7d0f8ff1ab143f9e131a0d0becea553. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AEA2M2224686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892648d44f6944084f246be0280b47aa2ed8aa3bec7c38dad2ea18dbb08a92bd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AEA2M2369207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77426fd7ad4d955bf0807765af5ba5dea63fd55dde58c4360bef757792585f83. 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/AEA2L2384562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6b6e4370832e03545408181e1a848a9e7ef7fc37437c780fc1a8758746b21. 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/RUA1H2418821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbdc74a1bb26b0f367a38fc943a00fd1f7007c2fa3d17e249c02792c477819a. 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/AEA2W2415529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719e1ad1e0274f020fd18d6a7f088ff83140be321883fea76688c28e35e785c4. 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/AEA2W2450917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4847e1d94a0a5bd7bda6f8b15ad00c6cbc60b62a0642ea70d280cc2caf63695f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZWFW2499582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8978cfe77275a69e3dc9c8b127914ab7437b9e3a42cd2bf18c03f55dbbce042. 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/QZNWQ2533108.