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 0x170b3c47acfbe545780d1a9140577fb4a1921bc247ff323e72d71291d7db5205. 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/2d30c81f-7231-45e0-a6eb-7d3304943a00.json and https://artists.proofprofile.net/proofs/artist/2d30c81f-7231-45e0-a6eb-7d3304943a00.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 0x3bfc8e885996fd49744ac01110b229b328978f72fd9c081ae1e7352a3d9a8da1. 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/QZMEP2481826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbd037b720e8e0bc4b8f9a4c10a395812b60a2abc3cffbb628922860fe38ca2. 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/QZHNA2419886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452dd57744fe1e7f1ae249a082df7170db2dd6c03d0ba03de1f4c4842c677905. 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/QZHN52480456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95eafb6fcce8929bd429e44b484c22bad1b2a7e884f565c34f1bcb35cd081b. 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/QZES52436433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e114bf96f7864a9e36dadbc65a7f05242863f0d26f58d85ec5d605b335a3fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ32418148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9083490d5ad038a3e940688ac5bbbdc0fe53e843fb4db798a85014152f16405. 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/QZWFN2335803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbe888efc316a02fb45015a4e691e0d44013dd6bd6a1947cfec286cc1fa92da. 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/QZTBC2304166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05042551c42398bc9f01d7be4ef6a3911e3e4bd03ae26a840c1af9dcf338918a. 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/AUGBT2318576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad69965ae51c92f758f5517eceef8cbeca17cbb95302633c5dab224c86b0305. 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/AUMEV2387783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b6989b8488c77e04b43d0ba1eb0d71034f26e4d7c15b3d4d94d913306260a9. 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/AUMEV2359678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f3de22e9af0897abf2f9a2d4ff497cb2b8adee4139c9ad3cca83488ad83f9. 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/AUMEV2346119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf63e47bf7a20a840b2158e52d90d7e7a23b33398fba4a816d57227ec7a43eb. 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/AUMEV2337407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f484dacc1e55cd37ed5b00c14b539e27f7d20428e4cdb9707f5133fdff2562. 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/AUMEV2316891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c84dff89c00ac6ddf9722277c228b08505784f5fb4b41f4124ef2540b84bfe8. 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/AUMEV2306138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d733ab886fb6835d0f1672c697759d3c4becdb022ab8a3795d4948127dc757. 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/AUGBT2223095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88eb1f287f7dae130f7568dabd7e6acea4c78b28a8a50e3ad26ae95d91d893. 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/AUMEV2285516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732ce2c0c09fc1b8c9404162e3204182e152b94c738286ce0795bb28a4722923. 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/AUMEV2272907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61d0a1c84c1b124464c663ca968a4a5ee9a5ca03bd8df2344bd9f07be4768d3. 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/AUMEV2264532.