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 0xa4ab062e5c350340f4679128bf06834719f980e05ef135335ee076af49f4ad89. 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/24d18cc8-8064-4992-ad3a-46bd0b240490.json and https://artists.proofprofile.net/proofs/artist/24d18cc8-8064-4992-ad3a-46bd0b240490.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 0x479b424b482d3d34a2b9e426281b753aeee316727435d381e78e0b6ce0de2610. 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/FRX762449164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f46db30a3bd5147a196d68c48acbe8fcd2233d4b18d08c4bf382d008e292f7. 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/FRX762449165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de83cd0a78994bb72372c06298936b8459bc9ee44def4cb35b99fe057d8d57f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL9KQ2390405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c678fc1c0e3e8a1d20dc6889fb4710c0a474bfb6ba56ad86be1e6d0eba1523b. 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/QZMER2404620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6bdde04d32e7f5f3b86e9c8b4fbd408e5feffbf924b6c14f08aa33cc3bff30. 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/QZMEP2474461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b67961bec8fdd87391739778738405076ffb9689585e6d07b669fd72875f118. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZK6G2428697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34755bf4227802a4222b65746bffacf73461244dc7ab6c3b26a2ac3002274607. 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/GX89G2572826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29180d093ea477bf0681202e7b6d9b3d7bee6e2869d600a8616b7da837f9ddf. 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/DK4YA2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc896dff7513014035bbb72d3d0a2b168c572b9e38e91b6a969131749b0a2c84. 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/DK4YA2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af477eeb67af9451243407dd09c2eac10c8465cd2ef14869c85bbbcaf7ed52. 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/DGA0S2483276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6215dd85924c05589ecc7e6a59881f8c0a6561c2c3bb86424b059e6ccfe35ea6. 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/DGA0S2483277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5487fc73d6bd57e55a02b1b216b44511679e269ac2a01f466f9e780c2646adf. 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/DGA0S2483278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5530e332286ccc253c78e271aae2326d6aa3833a8f00f845cf1317695781c311. 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/DGA0S2483279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35aabdfb7179429d1030f900f0a00be668b27b3ffe6eb1922377325fbe0a272. 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/DGA0R2472683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfbab0c0ec790da3f076a0cab9f81e14ad0ca4d98acc5987ccca5da08a1e6b5. 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/DGA0R2472684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea53ef6622909cb8000c335b1b75bfe676c80a9de236c03e1bde08cb8f35a5e. 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/QZWDD2599668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c33cac1611ef72f8ab911f3e59e13207b5ee44b9bb96d918176761ca1788422. 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/FRX202526927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bd60756faa688ded687df759b3f69acba76db1247c2d79558bbb396882a386. 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/DEUM72503374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf551d19b9f9a239ea0e20881f34e4a0df495a46ef8fd72ac840f539594623. 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/QZTRX2557333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bb42e0850eb1dd69dbc6c27be3759e7de251684dabe2b7a8c346d00f72671e. 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/QZTRX2565969.