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 0x5eab4f5dff89d0f70cce96cad155ec368102995f9facf0abe6fc12e1e6e84050. 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/3a1ddc9e-f646-4ec1-b439-cf3779599296.json and https://artists.proofprofile.net/proofs/artist/3a1ddc9e-f646-4ec1-b439-cf3779599296.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 0xa4dae268e247088afffe697a0742eb7bbe90da39c7d9e0e7a541cfac2ceb93a8. 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/DEQ022118710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616ae7e9acfc436d3c6e606130b1a0b51fcd3570f24eb78fc4b2ef27f945da4a. 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/DEQ022118711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d601e0bc493efe1d7760e486133c14618d52b2f7b0824ccc5c418b3800c7e49. 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/DEQ022118712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2764ea558f1cf959a8e8b2ff9a917fafe43789d9dd30d15b8a3f52ff96a391e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEQ022118713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df24fcec906ae2c2b309c62e659504a251f10b221bfe8930940cf79f835f466. 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/DEQ022118714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b5f43b36e4fe695eb39e50c74e02fc2de3581ffa3d751827f51a9bb391dd6. 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/DEQ022118715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdd511f2ba6a4048a9225343d37e1a49be7309fbdf6c639adc470eaf22b5d92. 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/DEQ022118716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005f1be175d66c66632a531d6428233e1ee6f6ac657cc655d177cab2519b8806. 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/DEQ022118717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26da8046d08113035a0310e992c04bb0c62c7890a0a8131b94f2190cbaee1f. 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/DEQ022118718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d72d04ed4a71b64f5f33730e6eb0f3c7237666b18f3c37a6338d824a86f082a. 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/DEQ022118719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30b4850cf4a4ec44027880e29a4ec7758bf66bae5b30a090862b921ca02446d. 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/DEQ022118720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ffb57a555e1267f244fd33253dc3b9f9be542217c51bda227fcf951ed9c126. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022118721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5a02e1fcb70c450e51156664bd3249b53ea9f96b5c70cc7397bb2b530a9f1. 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/DEQ022382356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fa73b5c57dd8bfa1738730e63339a10625b86ef01c54e11d8f6d6bf9a6e61b. 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/DEQ022382357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1c64e5c982e86b82da67de4d68b0a3e01dab7d6abe07536d2ff8d805b7a99f. 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/DEQ022382358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73320388203dba641306a2a94ca4db48c1bf3a9a0bf65b8eaae384aeedf018c2. 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/DEQ022382359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcdf8abbce62631fc96d3f68580d7ec94af11683b0fff86039ac4c6cdb9c66e. 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/DEQ022382360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f5ee8384bbbc01b7a476b8770d68353c599384c76c58d72d690c04277d3069. 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/DEQ022382361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bf2af5d013cccb7c7270b653565e0eab4359b876598f77b67434bad4d2b0ab. 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/DEQ022382362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f87e2512715b4e6f118beb122c95598dd585a9e68052d170c509dfca5fee90. 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/DEQ022382363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72a1329aae5494d42d95db23ddf3a8cc7e636cea3ad211f44595b4943c52440. 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/DEZC62408637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0de97ee0d9c98ace239c280461b86ba27f25434a00dccbd191dd09173a3b69. 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/DEQ022012423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a70a60b08771a9c08cdd4ba84583dc5a0d16094a71cdec4441672ee5947a615. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUV91600017.