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 0x6e96596ec0e1ac41ad38d0d2b54dc715d1e2016518d198148fc33aac2e0b7d2b. 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/eb59ff15-6875-47f4-9201-ebe5152c44f7.json and https://artists.proofprofile.net/proofs/artist/eb59ff15-6875-47f4-9201-ebe5152c44f7.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 0x73ed202cd832815917c68fe0c89e71b81050e70dbcae83ac618ab05e71d3c738. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BKCMX2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f791a0626f37c4f38f1c1bc104eef778e21ab250f2bbb05520d77b5ded52274. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKCMX2400264.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327048bddd218452207f79372597c0f91e3fa1089d4ef793b40283d850fc2afb. 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/BKCMX2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a019912a77674667f23ecdda0feeb00cd3e8d4988ea5f3b97d74854439f72f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BKCMX2400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87671a80815348602e2a20aea688bbb1d25488ef5c60844f181eed55f7930346. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKCMX2400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f163a9eed13ebfef3cd793288a991da73b4e2e7194a4d8a9439f376decf88aa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKCMX2400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4007e08b325012ad8373c177cc63e165ca9dea5bac517ccdc201ff3e60d168. 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/BKCMX2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2578578d758c596fb37e198b9ddd3243c37b4ee5d5d23a0400e1f3cae1d692. 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/BKCMX2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb52d835b922b8a44072b6b6d366021d3e840f5ed9c1cb11f3dcbfd2f1e85d5. 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/BKCMX2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980106db3536c23cc8d9d394c277de3d07b9d9b92a5b4c963d481dce720be53. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BKCMX2400552.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4b03d7f4b2b880d1f15c020103e8b048dc41e93723e9dbcbf6868152427353. 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/BKCMX2400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b32be538f3f08e3f911aca125505b77778ad4b7b3df778844360a78567957d2. 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/BKCMX2400522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21d96cb426a89310ff77866c903623df05faebd58a26ec88b4b9f827520609. 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/BKCMX2400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4580d94b19f7df07b3b7fe728722f70a6b30c0a8afb4877f6adc8cb47efc04a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKCMX2400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec793ad4266dfcf887669db84cf5516053fc6772e9140e4abb460b8017a70766. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKCMX2400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b8390520ad52eb9bbc674e592231a7bcb9df04e68796c0ff217544a50915a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BKCMX2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8cd0aed90a2412a462ae9312f35e3f2ac29b5f161a25d58bba2cadad79331d. 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/BKCMX2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a8f2228cd0da1107aee3b16a33a88cf085431785e307836f8ef4e4287b707. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BKCMX2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80b084cc4242a52e05a82bb89ab8e962e67b5866890fb75e52ff741a0199af. 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/BKCMX2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f0dd84668bf732c80a99583eb95ceba9e026a2f65e7cb75565cac56ae9022. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BKCMX2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06504f9a2942774ba85af16f480fe4f970946d019c7675e640d1b9fb4ca1c187. 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/BKCMX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caec568f6bb6aad2a00a8150a1c1751e68dedac5d5d2d2c880001ab3e392a80. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKCMX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f329958406a57e127782211a69389fca8ad25d37af06d2a6fd509e8337fc2b. 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/BKCMX2300009.