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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf381dba3da752ca1a1227b1bf5144beeafe86ec9501535f7825fa393252db8a1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22cbeb5a-0754-4802-a283-5d6d88c55665.json and https://artists.proofprofile.net/proofs/artist/22cbeb5a-0754-4802-a283-5d6d88c55665.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60a4fe83015f7a29e3f4ddfcd789c83c5ceac2fb853eac39e78464a0508a657. 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/FRX202180079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b537304483d1d42ec0cf64f0493ff0f40cbaf697042c13d177a1379d2f17eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R2126979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01958b6349e7a4a6155ea589e7abe33cf904b68751f966f935497c97eb5833e7. 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/FR59R2126982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a83ffb33cf22bce128491bc168953c3c12e2f8a5816a7dd38825ebdf072615. 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/FR59R2126983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3825f915c572a4b2f2ffe941187e4b5da70c755079b6bed5a6777db0d32bcc7. 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/FR59R2126984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae446cce75dbc3b2697f368adbff03042e447710ddc33c84e281ae04a406d0. 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/FR59R2126985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd379a26edc548ece1ee79188beeb76236557af747e69b7fba7a7303a2f889504. 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/FR59R2126986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7bd007ddbcab859bf4b301fc563aeec5dc09e89dcbdddd9a31ca4b2901f7f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R2126987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d08abbdc9a22660fb14eba3bdb2b786af5871bb03582d897f92a9bd0de13b6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R2126988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5debf4aa131257663b72e016eab5b2afe5e22245f3ae5adefa6db1c1fcbe1. 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/FR59R2126989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a7c522be35cc52f412b396c0052f3d18ec38ce9f8a2dd4df4f08f3461926d. 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/FR59R2126990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5d72f10a6d22fbea8e7702e9eafbfbb42eed7351a6a56dbe56ccc62e2b0897. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR59R2126991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414f485c945bb99d10201497a000657972cbc8d3be06c5df1f43ee1a1e532f12. 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/FR59R2126992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff93bae21bc11b6b1d46cb7c1dc4c2c15eae77459fffa168dadde2988a0f711. 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/FR59R2126993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcf12c05b0bc20dc4069dc750352480748647794b29c12b0572d79aeefe5ea1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2126994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab0f66abeedde4a7eba323a1fa0f4369e85b0103b9af36af7b74ae495f046d. 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/FR59R2126995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f58a24d6bcbb438a8675f95c8196e1ca610e1ce8cf61faed2aaeb9c7920fbf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2126996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb5b454f1c006bad6887e0be41fc5517c5a25265d14ce1e1b13b99b89eb751a. 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/FR59R2126997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327171ccc481488aa3e3f778bf44ac938158749c66cbd64f2dc0d7a6e9f10f1. 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/FR59R2126998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d8cc3539fa1c09c1fc56479beb39c234b4352755b3ef416dca9b87cde16e2. 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/FR59R2126999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fd39661fa02932eb8dff64f134e6b323499af4e09132cfec92b512e5685cc8. 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/FR59R2127000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe630eeb08408f17684e6e93b79d02a449f39d436b318cb37752aac1fa672fb9. 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/FR59R2127001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2d007f5eac11ba0775070b01b10f11016f43881d4cfd56d81e32996b4ddd9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2127002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0559c3b998e473b674a52afb3564deb7823d7f647cb5bd1d88e6d0d4e93922f2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR59R2127005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a5b16368a76394c84420f50880a0a7d68e7edb7a710d204dcca49e557cf674. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR59R2127006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30c403c1d513639a4ef75992a3c72ac838989fcbb5f055f5f5b62bfa49500c. 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/FR59R2127007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ead229875f937c94a88cace8310a56634459c5e717f229e971fc6db176c24b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2127008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb812b4288cf3a54a11e5d386205a2c9ef6ecf85d61a890cb0e9df8a4c8347e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R2127009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f79ff4fa5c086cddfee147e08fc20feb6595a8dc178373df2fa644a85a45691. 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/FRX282109603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f27cda3ff70b8e36bcdd43d12ae07a07f52ee239523f3aecb20a7d676a5c2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRX282109606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72d29270625dbf0cff29dd09e45b4164c2fe0d2a28d33381c3b18b09c46fc4d. 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/FRX282109607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e218cddffa92a146671ff47afe0ca27f6105bef67545292ff9ac09e238c403. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX282109613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca140793220b8673b3bcf2cd9edecebd88edd2f160140b88d983a248a29f70ce. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX282109609.
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 0xd3f805033619dbb001b70e94aaad4749a224306479b6244f1f0113582169abe3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2151256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7576aea67e3808dc9dc023975da035007c16ec2195acf86075748097bf4f9859. 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/FR59R2151257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20e1cdf089391973552d497989269b4114045442eb1db0dfd47701913ad5e95. 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/FR59R2151280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fd869e7986218e4d4f7711787a1821834ee069a7853b2feccae506bd6bbb27. 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/FR59R2151259.