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 0x6f31afe32e1922b5432bcab0b0dd40446876e1ac4c7a5aa1e5f777cc07f3eba7. 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/814cb49d-dbf7-4dcb-b486-267e6fcfc0fd.json and https://artists.proofprofile.net/proofs/artist/814cb49d-dbf7-4dcb-b486-267e6fcfc0fd.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 0x921ef5648ae422f3d123f879619d3dbe56006e9e003bf8259e8a39441c234511. 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/QZES52380159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8fde8cd09a3745e22b6333b7fad94c236d3442661e49da58352ccd3bb1fcb. 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/QZDA62390102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1c263dbb6af99f5fc0474c24e1dc9d467a68e486cdf359fed46ad0ecf1c3b. 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/QZHN92245857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c5fac4cbee322cc77b26a312b67bbc1ab23af802c66991ddee9681f4bff94. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA82252253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3769b78d97ba24ebbb65b7015bb1dcf7bb07b8e9ee103eae484c73acdd5e71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA1993261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5486460ef07ef6dbd911cf409bb238369883f006d3e3d41a67df2c0de5e0f60. 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/QZHN91953335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9088434804c7519c6537b48159e67a916071a4c0c38f08fe2fa5a214e35d76e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES71995362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2360d8023b7503a01bedecd1c567e57822d065eac6ff696d91e58736443db71b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES71995360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f860f7955e6657e3f608c283ac54d30a68875756ef78a1f73413bec157f318. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA61984867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69242516314d4e9cefaf7d9f94aa6545fee128a93af1858afe39d7c781abc73f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA41965788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684a1ca2dae52192abeff6160e013b0c50d35e4bca6c3a9d40cb40dec065883. 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/QZDA41966235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59109bc34df734300c547c635fd3e21f9cef85621735b301fd46b4cabdca8e67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA41966234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c61a7f79bc72a732da3e9742538a3e2ea3b14dce68a4de9690f9a2bd99d6bf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA71916636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f38433c4738bc3964a5148172b946b527f489386d77e9648eac857734ccf8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA51946788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65480bd916a57c3cfe33f4ae227bbc0211fcfda4aeeaf4ce06cf03e2c813e1ef. 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/QZ8LD1966081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad13b796c4bc47b37b27117df7377384fc77ce471ae3807c943c69a3fec938d4. 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/QZ8LD1966344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fb8d3a206ef8e27428b29b0a627d414a9fd20c33001bdf44405b4ad8707402. 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/QZES81830742.