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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbbc123f5f9fb90e500d6de700f83b3e057165172a568a16dd3e72f13268de1. 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/2df60032-63df-4dcf-9ebf-0f8c9ffe8ff9.json and https://artists.proofprofile.net/proofs/artist/2df60032-63df-4dcf-9ebf-0f8c9ffe8ff9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c9ee7b099d5777dec8487b05e3a30c6c3c65e656ee740acf8cabd5f3d6db0a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USDY41642106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3027a3dfeb1a045ec24e1256c731dd712ca6885cb9496af667fc6d0a0a961e59. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USDY41642107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afd99879edceed49c4d49e5390d5df91cdfcda6a2c1f9939af21f7d7c66ac46. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USDY41642108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b1957727dddad4be61b9414558867de7c15075c7524714d13e7c8c096f2529. 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/USDY41642109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638aec7f47ccf8de70cd7e8889f7375c18995df4d3bb9999f9a23d991a2484bb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDY41642110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f0acadaaf3c480dcee45120cc654289d1bddd109295561c50a2dc95fb4bd3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41642112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22739318cf680ef9ce76773de0f0a6a12d2d6b8e850526518656bf2e15291cf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY41642113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017ec2844f1051c524662a0b32bc49821b93db109def8662948646f3959ddeef. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USDY41642115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb44515bc8dca7948eed69f206a52bb9abfde98f93895466d9a90a9edb6c3da3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDY41642116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2200cb28e19ad78131949ad2895ccaa99d22dc05052d5a145f7b785e194545e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:19Z), 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/TCAEF1990416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f105ef57b41594edda61525a1f2817d65bba4ee7c653bfb8357df5324d4dd3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAEN1960457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9e2dde10a8378a2d62e610e07beb5e13d3ba1fa718c22ac54ebace19915a0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEW2021243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822642509c8c2f300bc397c4130df068a3e5355b417e67e80ed88f1a751aed97. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:47:17Z), 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/TCAGF2240935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd08001de012baa7f5c221854f366a6f447c2974dd9b4d0b77abe900f389d4f. 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/TCAGH2240866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea682f49920b64d435c3beb275c800cfd50c30558504bd485ef84ce93dbd9e4. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:54Z), 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/TCAGN2265751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292281daddda1db83a354b70f7757bf85c6e40f2bfc3b702fe46fbcc2852ca64. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJO2531737.