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 0x7184c2fd7c25ed2bc8e12a864b933e2d564de0e530b90e099cdb8160cff1738e. 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/6d80bcf8-603f-4909-93e0-8729ab6bca8c.json and https://artists.proofprofile.net/proofs/artist/6d80bcf8-603f-4909-93e0-8729ab6bca8c.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 0x70f4517fb69b7e5319f66186c8889d050591a256ab868379850c9e7682cabf39. 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/QM4TW2378543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029f33d95df717a156477a12c0c7f87ef78a7d25dfdcfe0b6aad72a8ed7b922. 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/QM4TW2378549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a6fda6f687bea51b6f71cd9d03dc79a098443ea99be04c168627e1f9e4de0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM4TW2378546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26fb279b01968b170a1a68de9a3e042bec7ed619f59e5c19d5882d56c980dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:30:36Z), 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/QM4TW2378548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3854a1df76c2939ecab91e7b271905ed2acc8286e9085fde1a1990426308f4f7. 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/QM4TW2378547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156cf99aa9a2b04659e87e0d319f54db4a1237bec9a4be9a0bcdd867c8caaadd. 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/QM4TW2287230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8774517fadb558f0e250daa2bab42c1511c7f7266b622e8d02ee9b9d190efe. 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/RUA1D2289956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fb115fb10fdef257d823ecbb177ee7a9ca52da941701f1d82e53fe442a5cd8. 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/QM4TW2287232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0421a49c27f36996258f1575d85cb5b466ab4ba2f4ae79ae9994b116209db0cb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM4TW2287234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2037373dfd6011c02ca645cf4e5c93a0869e624e4510a8828c58d18e9df42f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:53:31Z), 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/QM4TW2287235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03bec6659b976866a1dece4eb8977984b0bd67288803f11862880931e673044. 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/QM4TW2287236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ed5e03f8d4ab3e6398171d3859be74ae84ef0c9d642f2affb0c0a363c790c. 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/QM4TW2287237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02f769cf4595b8e8ec2a7e655ed98eccc79fc570b63fb16a44c02a089a8e71a. 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/QM4TW2287238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7368738a0d111df277c257866119b6f68cfc451a6f896349435f488c13337c8. 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/QM4TW2287239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269cb7b910efe0b6eff43b0d52b6aff08e5c49d4519d50fcb65f048903285e58. 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/RUA1D1902133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf751fa69256826d1cdc0f0bc8d5cc785ccf773a648405dc0c9aa2c947a334c12. 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/RUA1D1902137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c842943b3a76d25b3107b764fb18e26e49747076531eb931dcb948c54de13fc. 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/RUA1D1902130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c42eeb4053c4469be6a3a03b8c612ddb595ecd24e33059bcffab50e076b05. 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/RUA1D1902138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c1ddcb92887a8552ef24953ebf712d206ad8a5b0af5f5328b8f1230a1be0b2. 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/RUA1D1902131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdff3113825931fb8852965600eebb7800f86cb5187ecbeaaa8e4fa5d2943bc5. 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/RUA1D1902135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b47cf7e55acef8e4ecb1ec1f018b9ba0f67e0e58ee881ac9e8e070c4bd657. 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/RUA1D1902132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a539566bf76fc59bba7eb57378b0e1252dc473773870d034b53dbc86cb9d04d. 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/RUA1D1902129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7cabaf5d9a58d574f7b80b34cdaf2746a7f38a18491226662cc17d3c0f625a. 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/RUA1D1902136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7a4c31b3420ee0bc8396a2e6c9f21119f5f743ae06700020f50b3e97ea54f1. 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/RUA1D1902134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29770e5f22e615e5d565220fe4ccfd4955d84ffde0876c563e66ec0f3d52041. 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/RUAGT2400934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a11f1d8115cea9aeb185b8efd0adb0b12a85c7b45efb177d20673a5df4af5d. 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/QMBZ92309961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d00c08bc64f481fdb641fd301ac64d2a5069085773e1b6a529204d2e6bda45. 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/RUA1D2015366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74acb585f2fa1934519a1bee7bcf6b10ffc9ab6d720b39b6a5fe6c022bb9245. 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/RUA1D2015367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5bfecef8194fe681bec08e91fea82a28b426535fb18a9efa58ead786fa383. 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/RUA1D2015368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b59bcc3c419230287988d8ef7d2b953643ee5124c7e9fdcd228fef8a4a1184. 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/RUA1D2015369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95f9209184e0cc1c842a2013bf9bd1752cf682c2bb24a4fb208173f9a077cf3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:32:00Z), 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/RUA1D2015370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3d6f420d3dfc0f8b542beacfabff9cd67210979dbfcb07c2cdf6d4e411a82e. 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/RUA1D2015371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990884b6eaa216e0bc5375dea5b09c82d4833560a7f43d52e58f5c09a66d5f2d. 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/RUA1D2015372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a91f91e7a23c15d56e115afed817a40eb0168379cf7d29f36d1dbcde28e244. 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/RUAGT2326466.