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 0xe42b8faef9deb8f9d4f825fc7c28a6c92e15e1adc6ce76352e0f463c9f3fb264. 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/f5a05013-5e5a-408a-885c-35d96cecc446.json and https://artists.proofprofile.net/proofs/artist/f5a05013-5e5a-408a-885c-35d96cecc446.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 0x484e5ff37628904472df258ac830d4adf7803b24dcc17a03e80d879dd3dfb7c7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MYA110100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a3ce474d5c8f34933fd03fb387be52627fcb3512b7628a9e3cf149dbc305e4. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/MYA110100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269a2e3c5aecd60ead6dc025605e4510c3f93602b4ad4380708aefabeecbea3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MYA110400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660f034a5f66ed8979efece07b1a80226976523cd6c8cd5f57562402d4b91eb. 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/MYTP11300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ce414017ebf07313a30e82a5f710bdccf3b916525ed71f554f1bece1361bb. 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/MYA111500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5623c8ee3cf784f4f28726fa5fe0b49e15e18592dab63417c5d9b7c2afa373c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR2X42293888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f357e7d0ddac8de4088092277ba8b3a7e137b73df3a9eb2fdbffcf8a62d2a7d. 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/MYA119900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ce414017ebf07313a30e82a5f710bdccf3b916525ed71f554f1bece1361bb. 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/MYA111500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2accfe53a5eebb47663cf726b2f216d9a40fe8ee6fdafad8ba004f4a6cec0bd5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/MYA119900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ce414017ebf07313a30e82a5f710bdccf3b916525ed71f554f1bece1361bb. 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/MYA111500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f357e7d0ddac8de4088092277ba8b3a7e137b73df3a9eb2fdbffcf8a62d2a7d. 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/MYA119900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e059952bde74efea54c57eeed4ac8ac3600ca44b80d9f9bd3fae5af132f9a72. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/MYA110400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f357e7d0ddac8de4088092277ba8b3a7e137b73df3a9eb2fdbffcf8a62d2a7d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/MYA119900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b013d562925d7c8478e731d211147329ac7487beef1c4f77036f9a40a84d49f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/MYTP11400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f357e7d0ddac8de4088092277ba8b3a7e137b73df3a9eb2fdbffcf8a62d2a7d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/MYA119900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70258219b0ad75b945a14756ce916fdcf47ffe4fa8580af47ce59594d97537f8. 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/MYSN14200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f357e7d0ddac8de4088092277ba8b3a7e137b73df3a9eb2fdbffcf8a62d2a7d. 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/MYA119900114.