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 0xc94cb05a69030e0b0e63ec261403edc8ce1449a159846356eeb9d597ecaeb0dd. 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/0cb8c60f-f64a-467e-93c3-04d3cf2097d4.json and https://artists.proofprofile.net/proofs/artist/0cb8c60f-f64a-467e-93c3-04d3cf2097d4.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 0x4f57ad7313750f66b7b2ae96ce807b36502bf175c5c8bc7b74bc02c2f4b43630. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USQY50940710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67fab50367bde097af68af69ae41131f97fcb7dc20814fd8aefc2747369b4a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:56Z), 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/USQY50940719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9549732715c498999f6e9f22b3c8566c02b882c90ded4295b9eeb04b27f63ffc. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USQY50929410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d61b09a517bba390641f12d8f9cfded28674ea63d5db8f3b870de34b26ac12. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USQY50929411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45db8d4564840f85e7e12b301732dbd812e697081674869ea666563729bb9bc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USQY50929413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4e73356d396437af54118eb1d2868d52da4c1c18e2d6024714d8fca1b7dd0b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USQY50929415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7698facfd24c6230e844f816443867f1d4a9ce6b249cb237af56a1b2c06d5bb3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USQY50929426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6762a7c505307d44719d8dc3916bb8186a512ae49aaa3316bd2ddd954e5e5bf0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USQY50913607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6762a7c505307d44719d8dc3916bb8186a512ae49aaa3316bd2ddd954e5e5bf0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USQY50913607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb96533609d8f1b219d04cd2576c6683946fb9233555be16c0ee9c6cb5b6e10d. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USQY50940967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cd800433006fbb32be09e9c75d49ad25b4a042b34e929f0a909c83a4d173c4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USQY50940969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22d09821a52ad8f7252a79fc5d0e5e38442122dbe56df11b75b95ba0df50d9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USQY51268312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001a1c510f4b3e7eafdde9794b1516019211ebb6ad76dd13943ccfc9bb1d96f3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USQY51268318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f22d09821a52ad8f7252a79fc5d0e5e38442122dbe56df11b75b95ba0df50d9. 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/USQY51268312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001a1c510f4b3e7eafdde9794b1516019211ebb6ad76dd13943ccfc9bb1d96f3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USQY51268318.