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 0x1a5e6fa24218875853bfd346980579f16183b74fabd3a9ff12bad929899b1e9a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7fda6f9-18b0-42d0-9863-2ed55ba71c22.json and https://artists.proofprofile.net/proofs/artist/c7fda6f9-18b0-42d0-9863-2ed55ba71c22.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 0xf391545fe72518cc925fdaa5b49789e86414a0e949da80451883971e2dbb206b. 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/CA5KR2355461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962e33fe5dfec5e973e72e3941e374666aa1e76fde715b9de4aaa64c832d3fca. 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/CA5KR2370199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc234a55787279737dc69e20f45bd17c4d409a5fd937b7c0b077d9865b241989. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2425738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43510fc1f3efa93833e0c021a9cf8652f6540fdac699a7529d73d842e9b0e8ff. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2468392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb176d772a4486144e745d1d85aa3165d48dab9586e9988e6b3cd00c3b1500369. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:07:05Z), 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/CA5KR2473608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1f8edc4019fc482f808ee48ceed272852be7d37932e63345cee070b2de8ef3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZG2X2402269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b4e7461c434ce7f62a4d56f9c3bd26ab186a536f62c61e5dbd2223a472e6f0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZG2X2406176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17e50f0f67d886ce4f1bbc7556879baf47bf7288ced99a06692f3682194e23. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZG2X2408503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e41dc9f96a82d9107b4a0da2aeb9d66cb26c31b54b73c86b39d95c122b2ea0. 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/QZG2X2416121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda34136b5d7cca02e9be9fdf4671e1021f6bb66968e159dd14a9eb9a9045b1b7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZG2X2422103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc661c65b656ca486a7ddbf355e90eae75ad5f401d961f369506b6fe432c8d979. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZG2X2501504.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a79437b7c2fb0b0eabcdae5596b55150ecf29253d3b6350c77896c4d56e1e9. 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/ITLCJ2100344.