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 0xe630537b7806c5ee8d50df1cbee2ed84e36e233d574ac28ba50dc772af2886c5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2ddb4c7-a0e7-4265-beee-1e75f21eba9e.json and https://artists.proofprofile.net/proofs/artist/a2ddb4c7-a0e7-4265-beee-1e75f21eba9e.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 0xd2a95694706b4cd31ffdfef970effe4e1fb6f1d70835407c5c625de95c655c17. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA61868265.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e0ceaf3e762e7bef3e0be29189ceb4b4e5323ecf5d743ed3a9d3234375ee64. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMDA61889210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d52211d42ba511f9c6e2b68c164ba5656992212e987aa785245ae0a9deff90. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA61889211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e5077f1cbd5d809c705407a4b1b4e04f7dc206f8f89b4bb6c83153f0c8bb3c. 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/QM4TX1835698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95afbfd61f784898cfab881ac8801cff0ff409cb9cb45a994a96980e6d406b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QM6N21855005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968a2cd804c045f15c729d32e1473f5bc02c50e2792c13ccf786a749dff54ec7. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QMDA61868258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be7e47bc1ba5158c1e83cbcc57396c05a4301cafdb4ffb5f46818c49226c80. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:55Z), 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/QM4TX2144872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ba2abe6b660b64bf666789e0cc806880c0c7238ac8a932db2cf80346c71ea3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR96X1525586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cacac4e59c338b973fb08d091fa521e6148a5a4465e4f3fe5c0ea75c10e142. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:37:20Z), 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/QMDA72164453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1815996d7fd7b76c16f4ffc3df82639d0628ec3915a0dcfa5746094cc7d7d5. 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/FRX872529568.