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 0xe843a77b1ff16d4dc4e663ddad1a7d83254ceeca6b2ce643d88c488d79f334d9. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fb42a46-5926-4ec7-a9dc-9a54a327c258.json and https://artists.proofprofile.net/proofs/artist/1fb42a46-5926-4ec7-a9dc-9a54a327c258.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 0x4baccc0fdee9917919b6a121daed93f92a1e5cc4f5075ce7c6c6e62ebffff45c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBHFP0900873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e219e7850a4754c0f6c72bef16be36906c67c61d16e9339a34bddb20a294e. 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/GBHFP0900876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a225ddba84254b3917fa782786bbb5825fb35821cd4ef97b1fabd4bab6ec55. 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/GBHFP0900878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548125feb5bd87b4197aa8002913c7c8ca4c89a05904bc8f97fd40b35bd64969. 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/GBHFP0900879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481fe6ae1716216cec0a858b4015ac4ac2556dd7ed8381b0c6ec756e3e7d902d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBHFP0900882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000948e1c26a4d117ce51fcbe410cece84cb12764b878b21164baaa2f6c6e2b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/IEFJB1100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa8ceebd76f7da2c9aae08f5afc07e4a36d6fa2505ed35e71a5896a38daa447. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/IEFJB1100275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9831a2903f9ea4b8af6a6a65d76dc51270eb2393f1714341749712779431cad2. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/IEFJB1100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d24d440a1741ead9258a3bc997622178bfdf39b59969f87d3f7bfc582f73f79. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBHFP0800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b1235f9ef03e956eb95e815a9855b95d040f53fb79757c3bd3b1c7775d386. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBHFP0800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b99f23e467beddaa4a635206b67b12dab121d044909b2648d2a7cbedb887da5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHFP0800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ae0573d2d9488e9f9580afd19e206caad9d7447f4f2b142cfac9e44b6c8e1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBHFP0800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c897a56e6701691f84b940eedfd5b327437d0e0dd093100c0af9a842dfbc7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBHFP0800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b1235f9ef03e956eb95e815a9855b95d040f53fb79757c3bd3b1c7775d386. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHFP0800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d24d440a1741ead9258a3bc997622178bfdf39b59969f87d3f7bfc582f73f79. 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/GBHFP0800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbc1b2984177d1354a6b378f2567f92e1e5c46a35c3b93165ed61ecb4671d1e. 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/GBHFP0900891.