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 0x28265669e4a906db1b861117b120e3f529e5a65b78bfadb190d1b35c8b6efe8a. 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/2d565b58-e1ff-454e-87cb-969ee002662e.json and https://artists.proofprofile.net/proofs/artist/2d565b58-e1ff-454e-87cb-969ee002662e.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 0x46e9fb271ce88022f9dd7e1f570963a5197314129d014f8164639deebe4b01a2. 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/US3DF2403041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa598871f5d346195a9b4ac465b43672e01386032abe6042849082f837695e8d. 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/QMANG2231258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71574f5978f85dad20070c2ae7c8618dfc49fa24f6dba1c84d7ebbbcb44d80. 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/QMANG2201457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feaf819b82c4e531f13e8c3c54499d530f75980867ed7e61e22fbe4c72f8fa7. 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/QM3DF2284198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909e9ab6e10f434b4a484eb06d7328e442fd16ea99e844d476c0f19e30fa5d69. 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/QM3DF2258251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3c2b5a1109ccceaa4bc0aeee68cb2a1eec17e42d3f11e5053bfe3693f8d5d. 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/QZHNA2301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb395313ad8369ea0fc3238d4d2044abdf511a52fe6c5e30928192849f3900a3. 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/QZDA72312090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f630a8ada869771b4354c57d5daec582f8725a737564cae25814ea3f15520ff. 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/GX8LD2386679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043afb7b6e6566d4375415036e07d2e1e5d3ff2b4171ac859dfb29c58abe255a. 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/QZES92302337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aa5b0c6a77cb6fcddd0ff99bab15275b48e91ce37ad7aff1006be93e69335c. 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/QZDA82352950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eac3347ffd58f3701473ce6a8a38aef889f8a7ef5ff10510e0bc898422d2365. 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/QZDA52330211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cce09097598909ca301f93b5518293e8ef0b176ecf2064ed1773a69ec63bd2d. 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/QZFZ62321677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aa5b0c6a77cb6fcddd0ff99bab15275b48e91ce37ad7aff1006be93e69335c. 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/QZDA82352950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cce09097598909ca301f93b5518293e8ef0b176ecf2064ed1773a69ec63bd2d. 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/QZFZ62321677.