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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 0x971084803f42c00655ac1a8b25ddd4a24d06a23f1cb6d0db25f246c1949a5e39. 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/ed510b0b-cfe8-4230-8d0b-18695c9af008.json and https://artists.proofprofile.net/proofs/artist/ed510b0b-cfe8-4230-8d0b-18695c9af008.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 0x2be6a4f35ad0a790509cd8f3988d01fd18531d329c665c5eb647cb324bef5dbe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UST8K1737247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a59713e240d67f397ab0a7f24e33debd7cfd2d64dce6744d77a5631103b7d5. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/UST8K1737248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2db1e439675b1e13a5b18201cbe0e0b04a207996a6f3adfe86c027fad303481. 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/UST8K1737249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2465b39409c50634dabedec63c94f3572f17c2496510fab0b1f7d9c790f489df. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/UST8K1737251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec81c7bdce55a4bdcaea389d4a3e6d6a0e3c4e44b280b79d27e0a30f117b9f8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/UST8K1737252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde54d94dec95c7b2f5503facca3f95479c923e460315d6560e269217edcc9734. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZDA52060898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2b2fb3448b1e39f5f3d9f2cb73844bc27bc8a9ca50145147e2e8d878ed229d. 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/QZDA72040382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051f7253e6c3b64b09475d3da02b4dd627fe8f6e396af8e0266bd5dfd030e39. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZDA72040383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b342c1f789e2f0bc844a649226fe8644eacbb0a6020ec5c24c48b49a164563. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6K2162551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e026db250995e6d0b970db499f4016e57bca6443ee0e6203eb08427757f35a. 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/AUUF12201345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03adc343135f29111043b5288e5ea683433b13412b842705ac6fa20d0483b536. 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/AUUF12201344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e026db250995e6d0b970db499f4016e57bca6443ee0e6203eb08427757f35a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUUF12201345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c2b2f286f76d7e126df9fe057a2fa6ba37ed6f1150ddbc0efd54cbe70fec8e. 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/AUUF12301471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e4e78a4cd8775cd818d8b3576b71277eff1ea5b455737b574d598f93a33122. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/AUUF12301477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdf2fd778d2aa3dbe360f6259b64c70a4520cc9f1a09298b0cf5cfc1ef513a1. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/AUUF12301470.