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 0xb2831336a27d8c397603696d9d8023f8365ae306f3b17ec6af0d7898836ab8ea. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9666472-b754-4e61-922a-f02ed3d8cb83.json and https://artists.proofprofile.net/proofs/artist/a9666472-b754-4e61-922a-f02ed3d8cb83.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 0x89dbe2b196d8b424f93e5dd41117705f09730556e6e62ea01294fcceaa007a6d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FIKHF1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cc46c542a6f56d6ac90673398269c971df306ed654728f896689f13dbb786. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FIKHF1700014.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c66262e8877ee52bd74c4f5bea9b9891f0181667fa5f6aa8ec8d45bc5ba71f. 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/FIKHF1800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1603197edf20ba01da8ede4d6d1ff6aa1dc478bf023905f453bf07ec291519b. 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/FIKHF1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b7d7c14ad0aa9477e29d471491ff78de867aac31142b462864420db22905e6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FI7S52000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920607ae8bc2ac1cf2fe7fae1b1bad2dae7f74ba0816c3f929445eda8d33b39. 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/FI7S52300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbc548fdbe65eb300f244d3b0e104da4fb4edebf6ad386c63fc441a4f1afedf. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FI7S52300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bee0400c9969052bbb6cba878309881aa9c57595eb39eb1cdf56394a5204b4. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/FI7S52300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d4b3904d2d5b3e8c8a8dd91e310896b63bb0eabbefe87b3d60662d6d67ece. 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/FI7S52300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e2d5fd1dc2a80e4a9b0c3d8e551dea614e89d7e6fd3479303e0a5e785c8303. 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/FI7S52300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b927e84c975e4f4052030d70183e0747fef9d9f1d7ac6954555ee5c0f0802f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FI7S52300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd022d10abb16e0c4733fe647c5ed0f39cea27b6bf1020da29d7a844e68f1a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FI7S52300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fef65eadbcd511129885201d34be5341af128109ffa20aaf096a6e24ae876d. 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/FI7S52300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e710570b6488060d77a3e9d989ee994646f574faca699fcbeb4c9bed40527b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FI7S52300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93539c17c342cd738d5188afcd159a29b45cefbf89ee69760d0616f39babc145. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FI7S52300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3aedef43b69eb0d86bc7344b55d0cfe6254b8e7711398b1d0a83a9880e963. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FI7S52300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e979b17b5d1213a318725df6b9d340e5f29f0822713c73fae7a71b4d1978031. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FI7S52300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a2d7778058444279eea8e10a820663964bf44260af4ab61c6226a4e7d7f21. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FI7S52300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e2e8f4eab650b6171ee3ee54e63a2eb553ed35f0ba9aa8fe564c9895b15fa8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FI7S52300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d68cd73d03b8899b506aaaff296f3dd815935ed3ea32c9b42f53efb3f63b9fa. 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/FI9PF2200056.