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 0xb2f13628b5052009115acfc2f39eed1572aad6d2d5b0db77ecbf20afa789fa44. 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/cc8547f9-b41f-478e-84e7-a2036fe1aea9.json and https://artists.proofprofile.net/proofs/artist/cc8547f9-b41f-478e-84e7-a2036fe1aea9.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 0x4cd81bcbfbb54146a10758cab6d493f87ac79fbbb92690a40a7dc28e4c1faaad. 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/UKXN22226290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b33046afb5f8732d2075a8297dc44b40d57db8b302acef54aa3d8fa73a96b. 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/ESA011992213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae3901ca40d71f23b48001d53e9a4c63ae213714f3c34285c566538012ddcba. 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/CH6542239467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd50f69ec20575e82d68976d19c108e79f38688c561d4cfdc431199f936336e. 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/CH6542239469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ae91be822f40863771a7d423df44359d7ff95230841e10a61ac7e736a15c33. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH6542239872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b88ac5fc293ffbc18ebea7d7ccb278a08ba150f9d431c48474b08c04e155f2. 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/CH6542239620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a81f6d325306dae95bca9a8960840346c1d0633b9cd855e18c11b34e8f684. 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/CH6542239873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb97c855dc45088842a26168d8b9752f23715a616d7a1d69654c0c0142dca047. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CH6542239622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2804da47d405926585f43372b1ceb6583cbab175159543057ce5014c964b808. 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/CH6542239875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119acd078d4009ca289c78be7ecf795dc1f2491ae7bf15e00223259372fbe6b5. 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/CH6542239468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56469f6d04ca30ddf5f48e0aac83e2f66fe0c4e730a6da0e5dd7e09b45d5bb9a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6542239871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca537e29e40d8474c55d12b3448bb7bb5f4abbaea1cc4926d05ed47fd83b640c. 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/CH6542239874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227dbb21e1b4a44354f3dd7e77aa96127112386504f5f36e38ad67482b4ea63. 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/FRX201864032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de267baf33d459e377eacb54406194c81db292e691f8821e2eb1adf9835b143. 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/GX8LE2411622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e7e5340b63a84fac0c35a9cd917f97080eee039cbad228c9a4188bac239c13. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZW9K2267792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f48d34ee95f9dceb492b5062415e71979fd5d7f11b0335fa9b0fc665fa10d3. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZW9K2267794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba0b89c9dfe99b4663c28d16518dafc37843bba494957600b6820a644bf8796. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZW9K2267793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f7529371e68f2f7478fa4b70b2d4b5b2b1a109ad8f901349ab302f59d3603. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CH6542273916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b80011f155c2830d01ecd2272af4c9c08374b7ca4a577e29fe6c933e880b6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH6542273917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc3e893a5c10570c194e2e3990c01ba482d1ab65c299d75f018bdd9b6096e4d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CH6542273920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ce459f7e3f24d7f1d90b31cb99c939babd7f566998b00cc03c0e727ec72b8. 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/CH6542273918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3913ed57085612ab2a37f06fdc5da1a5b5b07779903c2e7c838623f64f04e1c3. 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/TCAGB2207084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0416872e53085b4593b0b394e2444e46522f49142f8891cc5fd94fd7a42362b8. 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/QZGLM2212631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b40b5caae42c494876e6763bf0bae21018d8ee8552a30e4ed1ee3a735c7ac0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTPX2133979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167cccf49b474da04d21854c26ac8fb85f740686142bfc2a66b07a99ad6a8caa. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNJX2114417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e99927a54920570373370659671855daa3f0fb57e512598717b629fdb70180. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZGLM2156132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ca7acce853bb7cdd86f371c3d658e7047505d051017182c32fce153bca2a85. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USCGJ2035717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1bbfa84448797763f3fc9e025528c83b0be80bd668373a4f2b745d5ad39e73. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHZ41984401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997c7b36f8a0af08b87bb17fd2c28c9dd54592c4845f2b9e7dbe16926ec4c608. 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/US7VG1855406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8736d132c23394aeddbcfb5464e68432ea26e3a4993880f3cfaef8946f8b2077. 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/GX8LD2316414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a5af46a8ec66236dc4ef779b69a2957dca6b44dd1cd5117faf45a60a885dc. 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/GX8LD2335980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c13e0485ff8711e2e7ff3c4eb51b003c838bc8b5caf6b9297fbae58453b160a. 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/FRX281705155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90079eac0790ef9f1e74b320441c1d13f5ad377c934e408adf878955ad6e142. 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/QZK6G2436640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363e57b9b3580f07bf477e81bf16eb9f238069538b368e24a9c28f21372e8efc. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBLFP2159131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca35acbb9bbec3189bab9cad8ff85cd19dbb090b8116b1b8dc106877955c9578. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP2159133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe794e4f3fdb6e666a3b1f58eb03abee355bbde1a7c44d9df9e2676a00a92d0f2. 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/GBLFP2159138.