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 0xd7a523b59ca6d2eb1b1bbb4a2830d04135a9c66c326557b2520d987ca23aa823. 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/e11ea9e1-b383-4f38-9d2a-13c36d351daf.json and https://artists.proofprofile.net/proofs/artist/e11ea9e1-b383-4f38-9d2a-13c36d351daf.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 0xc8e2329cc6b5c8302cb44d3d98cf7bf0239580073bf8fa16def4b2fbec70f22a. 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/NLU8E2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9863efd0886e77b54ca0492340bd70b2dd84319372fdcdf01c165113e41e6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLV62021946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae2ff6520c364640b2fe7ffd98e723f28db3f3e05a8d055856ea4eb6edb868d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62021947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb005d837584905ad409aa5655e1acbc8dcaab817fdb18ce95dc18af3176b3ae0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLV62021948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f0b784d41a0e962c6cfb1f21019493f846f06f06282b2aa28d0245842f908. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLV62021949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf61fa5b86c4f3655ddd926714bd1d65cb0b7e46509ddd180f92d6654164d7. 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/GBLV62021950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde355df756d9347aa7cb5d1e3d77299e5b1dcc2bd6d4c1e0fe8074a69a8d5359. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLV62021951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae087b580844627f63773d70f57511e6eadfd2fc798e94df1fa0cf9e11a1fd6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAES2083718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681df5a84d95d5006b33ac519913b44422069a447ac69130e1838e16d6eb1038. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAES2083728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f040eb081828015c0a73d484e2aa07682227ac5235bf8024e5b497ad78d8d3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAES2083729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737f917fbecb1a9bb32216208d5b03c62edb0e96ed8c236595eed22998a7a6f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAES2083730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e1c727910c6f8cd2f3770c9d100b0a996c3513ae7de479caf84d67b2e2bf3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAES2083733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5fa019fdd29f32e277af85be3e2cd468400a327df01cf5d9b4a34728560818. 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/QZFYY2081488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ec4f108d9a53bbe24bfd135734285704963760119384315e14dc2d663e6c3. 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/NLU8E1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd375ea393281b2577bba84074314375158fd03215b55a4bcf4dd842114c85b2e. 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/NLU8E1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8436bbd66f34c5b4b70f69a50582f6bc1167c8bb771d3eb8baa04c8d76d0a00e. 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/NLU8E1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7c9757ac7f27cfcd3d70dce69034cc440d265cc6390c1a5d5a5cd2ea8d82b2. 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/NLU8E1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0ea68cda649cee7aaa1469d0a6a4bdf799d532f2c21d225bc7ca3c7ce42c88. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLU8E1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9537c1333b04b7e639facd0ca21cbd75f502b5c05513eb023b72cb93c01487f2. 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/NLU8E1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799a06d6c96e211ba6bac853dc5b3ee218e32efa3a2ad97678afa0218410fd0c. 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/NLU8E1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21ffc7fa3c64e13956d7a749c9ace9092f26e2c62c17dc23b43c1f2ded7cde4. 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/NLU8E1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6e5952ea0e84d2126c75dc51ee97e1b2450b3eb3cabd0bf4eac489292595db. 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/NLU8E1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0770df6291abcbeb8e218de3f19ec6910d033db7f2e6726a4cf20f2a542be2. 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/QZFYY1959727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1c49211811b749671cb6137eebb72561076925d9ffe95464a5a249200890ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62040200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb8e4655d25e195bab946ab26efdbaf59665ac819485db079c667a42332ff84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62040201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a4c7019a965ea618fd06832cefdf6e1d10ae18dbf5f348fa3e73f34b341e24. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62040202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2222fd2c9f05b451697cb11e84430b53ac7cd3451470f81f43281109e81ec86. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62040203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136397d74cca4b3a7df920c4bc077878f56d900f0c40e2868b88fd492bd1486c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62040204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d10acd38e59365bf38b781b2cfb65994f27bcf2a5aab2830bed37fd233ddade. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62040205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b9139752c9649298b8ecf2270f584dc7b86e43f427ddbb14fae03152695824. 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/NL1LE2000619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82bfaab63a91db8432ecd8040b7e754d863f052c16dc1fa563af5d726f45984. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1LE2000859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d307452ad7ed593b208c92c3f6810d18132d39e9f57d956787a48f728edd262. 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/NL1LE2000618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392014e49652167bb3bb34b34c72b0383172a3727dd906d2741823bbbf0568f1. 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/NL1LE2000860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990fc435073b389b06eaadc9161609041852ba9d670240239ee47315029f75c1. 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/NL1LE2000621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed5f33c481a1411475f712365855b54956c1bcb0789f09783af85a8b185f9d4. 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/NL1LE2000861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fca186b14495bb51a848d622f8eee65010eda6da3b3c305b009cfe4a3f89ce6. 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/NL1LE2000862.