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 0x3c6cc610db16d5d19d182d6de86e185e9bf80cfec31895396c198eab61298987. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3326cb36-52fa-45a4-91e2-7df58972efde.json and https://artists.proofprofile.net/proofs/artist/3326cb36-52fa-45a4-91e2-7df58972efde.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 0xdb0d6a69e2ac03719bd68382cd420cf3f18877abb3ed9725eb24eace8a72035a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBMA22589950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03e84ef018ddaf1b6b3eceac31ab028fde6c72dfd52609c664e5bc1ba822502. 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/GBMA22589951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561b0450ab5a0e0f4ada60238fccc1c66fb618f6185d643ca29bcb9541a0f432. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBMA22589952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65db7e629e65942eee541d1397dc320917df0e04720a3f72237bc918365eb91. 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/GBMA22589953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd82983a66a68913883fe8abf65873c915bc40be3ef4788432a65befc5b48b8. 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/GBMA22589954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68d20e6f5faa958eaae1acc851dca6d139cdce235a2a0097e41f5e12badeaed. 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/GBLFP2547954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef211f5cffa433b0c360c77f817e38226a32023ff1cca8678d9f340493213c3d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBLFP2547955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16856348a22bfa2f6ff7c75b168fe6cd9c28af0c9abd45adc010b20a9233396e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2547956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87b3fc4632da7c8ed3c78f19cf72d806b2d7c2870cda2a5384ddfe31909cb9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2547957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be34a05249e86fd9d3ffeb8dde7e3b4390268be5f0424cae91457ac72eecdb7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2547958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f40eb5137fb04b2ff037e26b8c8d66a6607cf7c850524bb3e44654d2a96f4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLFP2547959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b3ec05f5ee4ca97ef7bee66081e23a7060ce74bd05d53e4b315c9f5024961. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBLFP2547960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cdebfcb83b02c71d33a1754b4aeded6ad2657c648469c5e385ded4836ea24e. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBLFP2547961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee9286edc3df305630d346000bd30c97f179ddfc7e572b44bee850484a7e854. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBLFP2547962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c385245307454ec717882ded66d1ef74254b88d8c5ce852bf857f375a832ec. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBLFP2547963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415071c7028d113a96044f3a5eef74d73cd382b6cfb42158e945d92f1f21826. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBLFP2547964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5dd2ab412243f61563679cc8dca911b7a31dbf5a899b6b7a3040b828f9ce48. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBLFP2591614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11843b2e7aa790c549d4526bc4978f3682d45773a3c29300ed446ae23acb938. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GBLFP2591616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225851c36c7bb4a44804c36b42c7efd3157f4030539f52a98f34bab742338708. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBLFP2591618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ff68167d07d76419d6341931d5603467b1515721fc3cf6ef4d1a2229c9678f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2591619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47285ed6b37a055a7a4de25df8348e2448a6f948fa3a75d644127af542959e58. 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/GBLFP2591620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcacb2ca8699a716d33ed2524d8951af4bfa3ded98a491857a5ee4cbdc3478c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBLFP2591621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3247ba34f7370f5f2db0af2843254f0b2ec9118344a1ca4bef9fa53a39af43. 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/GBLFP2591622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f471e531cb377f6b088279f762bfeb7304fa5c3331a256b0f2170b1b6e15d. 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/GBMA22593466.