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 0x16300f987e4f8ec58d81646a3e2bb19d12a37424b60e270c6967325c3fd6b827. 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/2c4f44c3-dbfe-4569-a54f-d87fb20bc82d.json and https://artists.proofprofile.net/proofs/artist/2c4f44c3-dbfe-4569-a54f-d87fb20bc82d.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 0x855f8ddec37e03bac738522b7848e4d1893af7949178b1fc4c77274ab23ac0d1. 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/QMFME2176121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94a76529b022b6d4b3adeb0a1a8cc02441f6cbcb727c0926de5556ae0a849c2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME2176128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a6e8543c548150156a6e513dc4795a7eaa8a0c8e4c20980247bc8cd89a05a. 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/QMBZ92063770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ab0cbc070c78d5efbc657111ac3a14d04721cba259cf6c62be3fc25d31ba4. 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/QZHNB2220995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed225b89e06d1509931c4f71d8a14eb1da1414df7b0142fd6c8dd569b07313a9. 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/QZNWU2266514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ea7a2da601a6b5c273e649e9f98cca69303af7923b40e41a8b347a01428459. 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/QZDA42243344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60f7f4276e7c68de4354b3b44d453dce4f5bbbec9f84d4c496300ce6ef2012. 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/QZHN72363385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c0254bb9c3bdb07aaad4b9174f04e02e3bcacb9c5f5c3ff1fddf15184163bb. 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/QZTB82255152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9003f331f0ffbff00aac035fb6c4f8f0b2a8e024d8758e6ade1638141881c3af. 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/QZDA52345933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c712c1421af67a0beb724097909482691c8b61b5d8b0deac29bce933a87c83d. 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/QZK6G2312970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c712c1421af67a0beb724097909482691c8b61b5d8b0deac29bce933a87c83d. 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/QZK6G2312970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60f7f4276e7c68de4354b3b44d453dce4f5bbbec9f84d4c496300ce6ef2012. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN72363385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c0254bb9c3bdb07aaad4b9174f04e02e3bcacb9c5f5c3ff1fddf15184163bb. 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/QZTB82255152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac72f0baa092c31ff93a755e84f390dd77a1c4bf672b9602aa1e803900bcfab4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZRP42297282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ab0cbc070c78d5efbc657111ac3a14d04721cba259cf6c62be3fc25d31ba4. 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/QZHNB2220995.