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 0xee43ae6a48523474d78715461e507d26fa01c9793e70a4c5a5897ae05c854587. 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/5f61cfb2-474a-4901-b12e-9a89938ea920.json and https://artists.proofprofile.net/proofs/artist/5f61cfb2-474a-4901-b12e-9a89938ea920.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 0xf81487e3bc7fbcba49ff725724a333e188fc97cbe35de10adbb65896a65dcd2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPQ2153043.
silence, the sea at dawn and the orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8836b96176352aefd4e4fbfdd39a70e588f37454a33168f4779a8e582ef22b66. 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/TCJPQ2153044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f79bf0675c39721309da7595111ba759265f3f0b392bbd26d6a003d3c154f0. 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/TCJPQ2153049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6141c36a68edcb0923c4841d2fad15f2b0641950b850a3dbd26937f853d6961b. 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/TCJPQ2153050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969502aaf11705033eb313089205d7e759e2c021ee35fc722137dad31669daf. 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/TCJPQ2153053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9391924689bc97e8c58ee8a6fd082cf70399a81adef9ad1b83768f7d0b07e19f. 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/TCJPE1654772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980cb8a0458d96c83e18f7a466978f672ed140e2a4375c72353ce15924dc47c. 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/TCJPE1654775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae226c087402fd998bad606f58371a81ade71d88226d0ff5503ea8ea6fa76b9. 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/TCJPE1654776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af94ec87167b06ae6c21bb0ca36f3d690e0007c001374fba19816c1551360a. 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/TCJPE1654779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71ccda9df82a59d731b99aaa64d5c75c6216fcbeafa9837639da76c32c9045. 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/TCJPE1654909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afabdadded2cb23936e83633f87814498dc1ae2d97c1dffe5c8d14c725a1340. 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/TCJPE1654946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41741ff99db1ec0409ab519c5b235f9c1f780305503748b592e3b190ca4d73e1. 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/TCJPD1546530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5779922374511ce939b9e6a786d3779510f25d6b72b342c203386fcbc74e2ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPC1554103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99d8135e1fa6f1c28e0c99e49ebe7ea5b73483e7c939978e0db8741a74170e. 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/TCJPJ1965428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19c99b6aa5a579c70e207e220dc197373623f0b6ef7a8b4e519cd28720aab2f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCJPJ1965436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc79f381934cf6c642379a1bdc2fa8d10f72732c24fb34c7d84ed0c0855cde82. 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/TCJPJ1965441.