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 0x68d879ce15945edf49197fe9b02a8990f27c4c65b26eb5d8f725f26ba72ebb50. 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/50b05d5c-0b9f-45fe-92c0-5f0e3765336e.json and https://artists.proofprofile.net/proofs/artist/50b05d5c-0b9f-45fe-92c0-5f0e3765336e.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 0x67e6650a693d7ad94a864509aab40d90c62288f5cb960a576147372d3e0cb7c1. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAJE2595750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f29de4f2d6d7d4c4f12336ce4673147e0a4115c7c833fcafad5c25dfe16391. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJE2595764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3667143305770b2143eb8c547387a84d25cf1cec21a315cec449148fbb07a74e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJE2595771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b3062fc12df0453f067e0e326512e2745a5b3f23111980c9ccd907bec73c2e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJF2595780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64cecfef3013c2a4609fc9b4d42ac2fafca626f19ba0f9a51d3b49b5d9b3e75. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJE2595785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd89fa0985e4295a6d340700dfcb05c51e87c81290c998b05d16d8fbebbc3312. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJE2595800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4021e6417d4ff62727f3304ad4709fd299b21c4eca1f8ea40f321fa141c6e1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJE2595805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e2510c80d4fccb3bba719e27fbfe8e9874d5f7169331d45c1780378fff69b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJE2595812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bab695b31b62a88356931024ce19a01ff2d1dd077fc68c8f3010ee68c852910. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJE2595819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd122c9615091452a4611970b24b2577f092573d164bf5935717c4b69f529d4c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJE2595829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705662e01306b6aa2f0d97d78bb9c440409a7ffb554ed5d1583190568b8ef12d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAJE2595833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee45d8f91e5d8fb6f2d4aa2da6a1c494be88dc2c9eae4bd3c441361b9bfecec. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAJE2595841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85a861d85cfc70f7ab70d325df55c9f8818694fc6bc2e78dbcd0aa89e12b82. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJE2595852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278038ecae5a8c7cccd77a133df7191ddc6f8375448e7c538065e2b1aaf376ef. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAJE2595864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1188030563d717f4089b3a2ef502ac9039dc5816043966657883eb31e66ec3. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAJE2595870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f74d176f73b79a6206938ae451b8b826c343fb9ac8048ccea2bfcb035d2624. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJI2545178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448fd82bfe651198f8e53d528ae1948c4ee1dbead1767fcec50591c74d06658a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJI2545183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5aae7fbc2045e84f712ce63dddfe01d0a9128694cf257f7e0ac109477ab34d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJI2545190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee09640f5e319a8d969414d49e9bbdd76d1e03d1cae1c823930d78757dc4a9e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAJI2545197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfc69ae1163ac81d36192d6b57000803b2c2e90b5c1eed4a3671d2b64023148. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJI2545209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cabe4b0879957c5710e78bd6b11407c0b0314babf0ee6043ddc40a0d5340f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJI2545218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb532360da58242ecfbfc42e71af5fff9c8f0c019d481f23819e22bf3871f59a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJI2545227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0751c2af9aab6ea53fcbf77b63dbc929471170839121757c7b91401fa56842. 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/TCAJI2545234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7447cd0150c7cee6ee6ceb5841440b0339a2a74c9e8ab1a2ea8aa9cd0a57ea44. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAJI2545237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737219b46803276bb9ea4245e72e297c9a114241cf2258d7524c7332ad479da. 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/TCAJI2545245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956b0183cade4cf0ee22e1a862a2eb8f1b2722b81950ab3690987ca881cc3590. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAJI2545247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8d0b71d824316c548428f818fe5ecfa864af6947b5efd638bba435f7a2e8e9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJI2545256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c081c58a71cb25236b4b1f7bd4e685e3c04f23bf5d0266ec0be6548aa3116d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJI2545258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea54b8cfc55d806509d2b9c81dbac74f4bbde745161f36814aa63714232eae. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAJI2545264.