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 0xb89c8b826f394f03fc4805d0b8732506e0bc68336d465cf97d82e66671becde8. 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/386488eb-2d9d-4c32-886e-b2a4d6b64ea9.json and https://artists.proofprofile.net/proofs/artist/386488eb-2d9d-4c32-886e-b2a4d6b64ea9.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 0xbbda5ede992715eb5f5888725c4f484afb6c4337bf96a74924c63fced0e7bb78. 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/TCAHZ2446359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06703e048990219dc8fcda300205134bba6446fdaeed6724cbc31630f27311be. 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/TCAHZ2446600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab02bd44219bffc0657f0d9a4d8d5f7fbb84c763d485653e1876e501319fdfd. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAIB2423141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f5eb0212058fbf2e1cca250c09eca60274f35d0e412441ba5ab0b8edec4920. 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/TCAIB2424504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686092d68076d3e57453e91c95e003c9f8a6bfb088ee5ade78489ff1276cf29d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIC2445788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e1deb63486ad9f72b7e65013b8d2e7faa495fd97a38914a3286d073c54b48. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAID2416606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fe5d6d55a0f999f9df783ca15614d23e686c81441f940815f5218d0794e0b3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIE2483798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa54c96b709f7c259204603f855097af7ede379b9c7054c9436ffbb343a7f04c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAII2441606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4329f11aedc3ed0a332565325ac532a0d39075f08dfa61570629f9fe7523f. 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/TCAIK2423371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeffbab9317728f5a16ee084e7326ecfbcc040c49739f835d5cbe107fc402e7d. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCAIJ2447760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97571c2ed85c3f86bd8133af8738df0ed98bb8d18c6e9e54fa6859991b43c966. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAIN2461037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16337147584333ecf03a63172e5097f0544e7c88d9780434bbb1e185130e0bc. 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/TCAIP2417932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ee2cb6a312940939d505a6fc8f3715cfb18c02de4a571423239bf1c0e37a0. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIW2429395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b957c09edd84fe94bfb60543f9c75867865a835d8b1fc1bb815bf539110f43c. 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/TCAIH2474266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d50093465d47bfd5bf8e18723610dbb6be7014dd864ea2019d9aeac1350a32c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJB2484853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249cb568ad2a368999013ac1d29faf9dd477d406c112b1f0d4bbf1c26a5cdb1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJF2564688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e987cb2476fb8facf53d51fb3eb82c3ec13878e53851e32ebc0ff0329407c07. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAJI2578089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd9c11ba92c2d33f8e3701f990c9798c2b0c2dea6a116d364e4cfa132add86f. 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/TCAJN2544220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d531e6c46d2185f58eb9e6d41ecd83f7b379bd3c370e35512ffbf66bd7bf5f. 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/TCAJZ2572919.