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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b48b5b3785d5c7c0546ed02172f934d760fe9a60327e8980fbc9fdb57a852b. 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/0a5a35f2-c848-4254-b032-9d1a8dc2f0d8.json and https://artists.proofprofile.net/proofs/artist/0a5a35f2-c848-4254-b032-9d1a8dc2f0d8.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 0x4f1117080d96f8ad2e532fecdd23b6fec3aadf77d04128993a4b707a6a3e4350. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAZ2416306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55f612ea1c8d43a3e7b8b07d6fe7db142c830ce279a4b3724da28c19b28050d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB32499135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acf5f6c88649cb13bf90ddf270ea2259fe7ad57669a9762700598964f53ba54. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB72446663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d2918b27639cdc0b9d8857c2e042d04ea1d76a2ae05c11f7d1ff1b188aeb9. 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/QZTB72446666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00216a2de68cd8f6cb18e6437aba6a55461318c045af9ab17b454a05881f47cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBC2480692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404996a9b09f9c68987aa7b31afee785a2ff3e381b0ff19762c616561039791. 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/QZWFE2446297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694d06b528f5014dab7fb531ca7b6101d8735825ed5dda3afec0715c7136036d. 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/QZWFE2491842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529e5b0a2441ab49ded38a6813d4442ca006d8c2f1bf7cc4286a125bc469c577. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ772432473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb1d86a28bcbd79cc87a1a24fb2e2dc74e58ae09a6e84c80d5cd6d0659b7fb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ772496960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01db5f3c073c4dfbd3c2892a1089199fd3d9c198ac162f72256f13f482a42a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ782430126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60309c7ff7767dcfdd1d058986946b75a1cb8e215bca1a805090a0251b2d897. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA52540411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64975c32591f64f1294eefe740b235261c609bc9b0c2aa3bb89415c2f5d4cd4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA82596963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d473624d47ac26e1a6ba76dc352e9b179bc0ef9d28bf52c569cf817d79b186. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62584184.