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 0xfbaf4d609a18a96fa4e89e957d72862e423bc7b395e9efd3c6a8b24bf0329735. 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/a0f75848-7100-4497-b19b-f00598924742.json and https://artists.proofprofile.net/proofs/artist/a0f75848-7100-4497-b19b-f00598924742.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 0x6fe1769315ea1a4ea617337ebd5b9d4db879a93496bb89f19f5c6dacd363c3e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYMA11500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7658403a53fb0d2295c7657143e44a82241134910334703cff90cd3098c6b029. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYMA11500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec5f96217c67fd2b83928c259321c8d053f9642988b05cdeca137d9b3bd94b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYMA11500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e864fdda4221171c49cbaa9864a51c830e92287295eca8d438317b9d6c0cad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MYMA11500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3e43f07581e64ca83d7ff1a7a942acc4b3ebebe72c95d443216e6a9f4ca7e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYMA11500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41bcaaa69c8139f771754be92714a364e02e646603fbadb01296044af5a16f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYMA11500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950899f11648a9e29064d99775c53eef204ab88ce53031359c1352cb16e35bb8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYTP11500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba07248962efd6e32151e6d155912ee4876f017f5658cc3a67a5d29b4712029. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYTP11400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0751dde9fa8d779ef49b7f1f5859ad98ecc9f7808bde173be141aabab749a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYNV12300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f5c8e6301aa4577d41cd91f41d0e83c9b57cdd0e1a7a9cccc5aca8fded99b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYNV12000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b82ecbb8c61d9aa190a2337e53574e38487cf5154f0b26bb8fefe6e16d878e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYNV11901062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fd871ec3afb4966447e29eb37b8a38e6545d53aa3f2a7238b103c931caa8dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/MYNV11901056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e7aa36cc20cdc5ab7fcf21c102594ea6817d1c358175d997385e15064c16dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYNV11801004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51553c13f1c1201b519792f886f17fb8b2ed69ca85905c1f6b306e2ca699bce1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYNV11800963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0ac47bc39fb50bfc0710f9edd1c65b2124d916a77d942d34e2432453c548f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MYMA11600891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f84b8990284cfde1dd10adf0f1c4933fbc76a816a1324dec3a90b88a47427f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYNV11600904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950899f11648a9e29064d99775c53eef204ab88ce53031359c1352cb16e35bb8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYTP11500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba07248962efd6e32151e6d155912ee4876f017f5658cc3a67a5d29b4712029. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYTP11400630.