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 0x9c0d2f4f418087dbcf93ed94eed53ae726c8fd4f464edce8ef0c29a790b9aeeb. 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/baa2671d-3984-40c6-a57b-c96ce58c58de.json and https://artists.proofprofile.net/proofs/artist/baa2671d-3984-40c6-a57b-c96ce58c58de.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 0xd9b7559426ced88fbf5d94667429f3906e95b0b915a2454341dde2951a8d7bbb. 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/SEYOK2115890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4de637a8e88d1a6891d0aa3be124e2221ce8334b333eccf999ac5041bbcbf. 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/SEYOK2115891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9362062f4054fcda911d7dbb6ee9e46924b7527abd5f157dddaf9ceb6c2453. 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/SEYOK2115892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d48d83fa37cad830cc1b359bfa217531547c3287d89de72c17b71b290b4df98. 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/SEYOK2115894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a973ac9f7ddfb5999ad70cdf7641e19903052635d7d9c30a0e9c10b3c05db9. 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/SEYOK2115896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97bdcea6dad9a391380f751f1a14b97530a34963cf54323727c656ace46833b. 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/SEYOK2115897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6031ba6a3381f258c215eab407cd3809b9bcfe7cbc17679ac6fcb742bfba528f. 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/SEYOK2115898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fd0acd83ddb799bf3db2751281196f52f44ac79e853f31a4cf2be6a789de5e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEYOK2115901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f9b3481d1529a72b73f881847050f50d767e746840075bfdb3a7b1e57f1d03. 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/SEYOK2115902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d71c8de94ff3873e77c6a178e5c0a639cf38388fe8978ad05584815cd337d. 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/SEYOK2115903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa966e5fbb67bf658e8c972769257f218f2175fb2dfb208729aa4b794f87ed8f4. 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/SEYOK2115904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9980178b06c66a22f443caa1980f72f192ab981addab2d6a76566447913606. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SEYOK2115906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09839cccb0fca137ccf515c88529a7e695258f2dc19fde9c0fae1e6956585d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/SEYOK2115907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe214daa1a350da91c998bf951162a4f86db89eb59f0a91a5e8ba08790626f77c. 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/SEYOK2115908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a271d8a1528e4f831d62147aa84f084b16bb529738eb56162d3a483b597522. 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/SEYOK2115909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d45940bc81a47fcc34e5e33652dc7915dafed7e948f30b02440c0df19e6d46. 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/SEYOK2115911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ceee34d1a4ad780be1b014e4f2c35b91dc44e91d2ef867802e825e2ba231c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SEYOK2115913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c5343914c3972464c7c8a65c3375590bdf646f22111f5f45bcb82e57636016. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/SEYOK2115914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c67772a60947cd17c52a53f4ab5707c37a803b90ae3730f209473a28ac60667. 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/SEYOK2115915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e111dd470e9dde594ce82b04ba6419c2c6ddc54ad381f414638b9aad097e68. 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/SEYOK2115916.