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 0x114fda650a3f4b5f47c59d71d7af6ba0f9814422afbb6c48d856b85a3aafdc43. 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/0897d354-ad3d-43d9-96cd-ffdf69724915.json and https://artists.proofprofile.net/proofs/artist/0897d354-ad3d-43d9-96cd-ffdf69724915.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 0x45e0e0df2b6b3c8079d7c2aaa1da97d2cad518ba9f30a27412a0b5f5339bc312. 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/TCAGP2211654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f0564d631aaf28bb3eb467171b2d021554a53f63a3e83219f68de2e7d53cef. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/TCAGQ2211931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fae06b1c01539d6e4f537ebaa628c971ff1bee74aeb6f9bece06af83185053. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAGQ2211965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c06a80e9a0c6dd59075633d50cfbab8471794d9bcad62c1505f79f04bbc5d3. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/ITDI32300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0530abaceba2a31bf83ca29173840294a6a7a22d00493dc430be34bee5c071. 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/ITZRF2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac5e03c838711274767c3ef6f78266ec7a7b738b8936631a97bececa3375d3c. 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/ITZRF2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac5e03c838711274767c3ef6f78266ec7a7b738b8936631a97bececa3375d3c. 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/ITZRF2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5048f89d0c04cd53ac312ecff5e49d6d814fe39f17fc9a70f0a69896f74bc554. 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/ITZRF2300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a96a5c8f3294d1198d846bbebf953359dbb1a2dc373dfdb31449e65de137866. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ITZRF2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa408230f8491cb79984f964b5ea7d1cfd408a04b28be8c770e2257150bb30f7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ITZRF2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf676352a7580bf9976e2cb36fe06c479181bf6176da1b3c45a57611b4e04fc79. 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/ITZRF2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e24fa738191965a634549e07a80c661f3fcaa04f1be9dccd180c2d29f84930. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ITZRF2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed91bcb84caf4cfb2d7242977813e6ebf0ea5fc3bbdd0e1ff991b472322378c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ITZRF2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa408230f8491cb79984f964b5ea7d1cfd408a04b28be8c770e2257150bb30f7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITZRF2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf676352a7580bf9976e2cb36fe06c479181bf6176da1b3c45a57611b4e04fc79. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/ITZRF2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67c0a39879141c0cf4c15679c5b852be4ae994f1dc8536d93855e519be63ed. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/ITZRF2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a8982cf915085f2cd1a04c4156e973c5698cd653034277b4f766a2466524a. 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/ITZRF2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a470c3da890881405c33e9b6fa5bc8cfdf5e51fc65e94f8218679aea10ded. 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/ITZRF2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3d9d9c96ce4a9cce65ecb84a22e954ef3d2145069cefd845fcf1913091f8d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITZRF2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe71f536fea2f6ace6e862eda304efb1d381a13a678cf472eb81babede38797. 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/ITZRF2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a175b5b919c7e66037902ed5eaca54a25dd60fc7601cfb597525e98bd9078. 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/ITZRF2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b82c263c9470a40e98b6b81906439a08911610e7b72dcb98b04438f2154c7b. 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/ITZRF2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a470c3da890881405c33e9b6fa5bc8cfdf5e51fc65e94f8218679aea10ded. 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/ITZRF2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44068ea9a50c18e4be437dca869c7466f760b29301a764a1c8f565d0955614ce. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/ITZRF2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa408230f8491cb79984f964b5ea7d1cfd408a04b28be8c770e2257150bb30f7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ITZRF2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c4e517d02d7479bc65d15f0f7289ae1c99004d94c0c4f8f2563f5971cc7a28. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITZRF2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e24fa738191965a634549e07a80c661f3fcaa04f1be9dccd180c2d29f84930. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ITZRF2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a8982cf915085f2cd1a04c4156e973c5698cd653034277b4f766a2466524a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITZRF2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9fb278da082597709ddc5ff738857b4457b21f9540fe539235ab369f18bdc9. 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/ITZRF2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79de62e999fd53d6898df829211c4aa5d5707a3742346ee040efb9bb560a7cdc. 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/ITZRF2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee6f773e1e2701e64694e308f4e72367e7c07efc652de8b910a21e28ec3f27c. 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/ITZRF2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee6f773e1e2701e64694e308f4e72367e7c07efc652de8b910a21e28ec3f27c. 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/ITZRF2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adb42d6195efae994a90a3eb461166137f45ee280c9f9dc22a5933b13eb097e. 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/ITZRF2300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61353d0da1e408db653cda53836b5e67f9454cf16c82bd5ef6f92e1892b55571. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/ITUEK2400001.