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 0x1b9e9fbf2e06880480fbb6319afc8ca9dfc4a0b093cbe6aacbf056af7419b786. 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/144a89be-fd6b-415e-b24c-4500cf0bfa7f.json and https://artists.proofprofile.net/proofs/artist/144a89be-fd6b-415e-b24c-4500cf0bfa7f.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 0x56c01542e15bfdf19b4660834fd6c2983645d70e2c81953adb4da0a85ae23393. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAID2430721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50d3f7fa515cb119f08d5a16c9251d7ec8952a8c06eec3e5f2ab0f08d186b8e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAID2430725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ff6f12fe94cf464065cf0be5d98629f71da97afa06e3499b14885143f81ecf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAID2458856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6829ba36c201fce5d56f22e3d79b5f31e796a0d1e48d488517c3d63fefa72. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAID2458857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e91df0bd8c5b789b6b04b57ff7ee7d83f913f241cea4ae29b8720dd9f472c45. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAID2477250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1a20253759593ac4fe1af7638fe47f7a763e0e5aad6c6422c89e4c9297dd96. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAID2477253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6be93758c81e77d90fc636938346a565ed7f5d86e4ff9c5da5c31fea1683ec. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAID2499185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10525415b473051ed4947d6c7670c309b683e33485f8cda0feaa2662b30a800a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAID2499188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81f1b5dbb481f91a5cfca91a27b1794ad12ea14c56818dcd6f33b6d5dc0b09. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAIE2438317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3a68199ee54df22f820d25ba6b1980d03924371e3eef545ab4d129d5c95587. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIE2438319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f5668ab5f61f135c93393afb623952cbcc2fbeb35087bb7c0f25cb6de80d2c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIE2459708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678bea6711c49fde89895de6fb35bdc76e5038b3499a676dd3404c5bde9187e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIF2459712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b751d5a877b9bae3a2c38de88e006ea3308c9bfcd1b94c02844cdd6d8053e4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIE2472177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21861cb8de7bb7ba9fa73be278197a1da75ec06a747dfe64ec84fa6fc2aba29b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIE2472180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17110b6df285bbf634037a6877aa412c6bd6340a84ba7bfca15dba8f764112e1. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAIE2496314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46055b32021e10a19c0b9fe1b1a97ea3dbbeb25e0e6077dbaae961b47bf189cd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAIE2496317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7099ebe6e259c06e63344bae387a49a64762de00e694cb34b77b434ef4b5b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIF2428053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30523cd895f0b5c110ecbdbcc16df2031102761445faf29a9a50c21a910f6f5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAIG2428055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf458d2365d9b37ac162e4b55acd84e7be9737db9419dc62088ec96afa958b58f. 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/TCAIG2488836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301cc2486d2e54d78e0b9faf0ca5978c176255b4bf0dd3e6f380c3475348c9f2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAIF2488838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a382ec5008b55e55e748e2c578334b49d6294dbe7d16ff5cca0552c77f27f13. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIG2410962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911bfd13ea796b7257478ac5351e87a478aa6b7315ab3f51c1da33bdb561a511. 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/TCAIG2410964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e0c0f1fe1b6acc1fe7313d449d42f20470f9063d628411e5c84907c32be99b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIG2436044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0004f97685a212b7ece25a583ca4e1e5fabea17d39d9a932bdd724aa4a4abdd4. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/TCAIG2436046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06887d0bc55cd6a2d4c359825e4232636dbd25cb03fc72d78885460be004b5b. 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/TCAIH2469409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c13e741d91236d34426a9881e918380dd7bf5faf3de45e76698333bacfa40. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAIG2469414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88eac8b93057a30d7bf979f4b9fbe942e53ffd2363efd963d2554300824bfe4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAIH2435164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f21c121ea2449ecf1d1f3143bdf8195d841bece62c1821a25cabef7b0556d4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAII2469605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c165c8c35ac94ed63e2d51d5a2cc7b61162841dd857d53c0bf051c0f5002425. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIH2469608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cb9c060c7d287b06310317332498cd7f376d63bb29a5d72f71f43793a1430e. 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/TCAII2437106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb46d6994dd0b6613bf85be1a1c722da403a607060cd909387178e9cf18db6d. 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/TCAII2437107.