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 0x29c15fd7560a6992ec55147803deb13231222f9a3ab4dacdfa6baaf2395bcbcb. 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/d2e9b6ce-4751-4489-9179-121f907c592e.json and https://artists.proofprofile.net/proofs/artist/d2e9b6ce-4751-4489-9179-121f907c592e.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 0x3857976a4463b879c1252d2a41d1ff2149704e4922d35caa5440d2bcca4c276e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USASN1810149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8535b63d4ea7dd6a935d7c8139eeb333bc46da33a1278f916caf700844615b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USASN1910205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44507f1fe863ed232589e024160b356b8e4e5c1b0fbc344705d06b5143ea12ce. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USASN2005190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518318ab45ff42bfb2e502728f395a65bee59b9b10ccb9359b53727fbb4d4747. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USASN2110015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d55700d31a46f6df8dc9f858026c10edeecab4fcf43467617364c6556ef3e3. 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/USASN2110016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ebc641f370350b66bd4c68e7b2c878a394733a38bf7485747d3a72939b148. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USASN2110018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9764f4bc69f75fab73bb66ac1fc39f6d532681031ce4523808c83685fd0a4ee3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USASN2110117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5486149a2a1961bbf913f91c818d1497d72df13e7fe83ecd465077d918387c5c. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USASN2210011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c986a87d07923504bf4067ff5c6b750af649fb19ddad2a86ddd2ec617024b8d. 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/USASN2210176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e135dc93bd1e6b1da2122c5cefe9d4fbe5545f380b47412315774757abb8a2. 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/USASN2210177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00261a98068ce7b64210012ad4fa047a9f92bdaadea5d4e8b51f1bb37c2b3e8. 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/USASN2210178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f789486d174e026bda56414e0be15cb07177b051745bb93ee6162150dd5e5b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZN882249676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e18d426d2c6a5c5ee7110a4b6a4e2b5a72d11f79c5293c6d39d65a0fdc114da. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USASN2210179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2257005bbc109a3b56c585cb67f70bed40d19d5d6e7169fffa4838512e8c24f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USASN2500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd35513bb1b085f6d9bdcdc74ec57d6ee03f196c93bc8d9cb7280f956572600. 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/USASN2500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01730d715ed7a680d7689f853ab9369f293c4431c5fc344bef8f9cd8f5c1f76. 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/USKO12100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70754e1670b37908673843f0a47d256d7002d022cab4a0b20f14613ce38500. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AUGBT2410505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dfb2fa5631ff61cc1f6d7e32610d74a4998e7d0ce438409c9526f563a0f8a9. 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/UKZGC2400038.