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 0xc1e32ca73ff58ae74b0fa21eb764f5309f08e2db916ff05b5723d607a7cc164d. 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/8d72a344-6b4a-414f-b53e-bbc625fefa31.json and https://artists.proofprofile.net/proofs/artist/8d72a344-6b4a-414f-b53e-bbc625fefa31.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 0xdef3ad7569a4d7ecee561e34b2abe7f170972e0989da4713d88bc84ee083f419. 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/QMDA62304279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa771a8a87228bdb8287776626d600d8d2c83383fc2e2069c70f16f5a1eeec70f. 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/QMDA62304342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d5ecf054088219f9d2c7236f04b7faf8bc597f3b3de9baed2fa20f465f3cf5. 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/QMDA62304400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61acfc600b18178edd16c4ba7184616311d1530ed1a5ce3e69c3073106ac537. 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/QMDA62304432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6573f0e0586d8d3b62ec462c3fc0d109d05f846b47d5d7f04524fb17508df71. 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/QMDA62304447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4d907aceb36ee18f9a6ca97c47e233ffdc5c1567d5cce71e4771960482d01. 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/QMDA62304803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb248d64a861b6a63f67edd2b3e2689aadb088fd4559e65a0b7de3be85b7b53e. 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/QMDA62305668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f70ec892442f90e87db47d8efc87ef128b0b814584f927e378d06773b78ee9. 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/QMDA62306076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4160c2cd8f1810680209009b9b3fc7cb6880e39694671fabd3677c4d013448c. 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/QMDA62306157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6ae92906a468d958785d0fcd078936a9daf96ae266cd839ef6af07fb9f5642. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMDA62306173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cd92ca391c2afdf5b152e3c71f8c3abd96836115afa0d636ef958f87557cb9. 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/QMDA62306234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6494064000d3338cec02d42214e3706702320c1eb47779394083c2dda16f67c. 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/QMDA62307586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf540c00dfb22f84f6f0bb33968221a78d75d052224e62ff6871b484346304d56. 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/QMDA62307590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90af4cbca04405d2794c664a735fcbe8700eb93db4cdf6526d7aca080c7c2fd. 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/QMDA62307597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8c3c4ed83e21d64aad93b915d4ba21dc4b77de46a43c7b19ead329e653ccce. 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/QMDA62306168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fc8566450a73d39885d36defcf8b045de3c110036a077b394d89c76cec7ca9. 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/QMDA62307630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c447314ddcb185e9281320502e77ae31960a7599ff5af29948d2a6ba47d4cb1. 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/QMDA62307645.