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 0xe3944edf2982633f18f214bd579859719238e347153083161e0bd05aea0d24db. 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/e762bb10-0094-4556-be23-91159e352f56.json and https://artists.proofprofile.net/proofs/artist/e762bb10-0094-4556-be23-91159e352f56.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 0x2051307f0824e0657d106707e08988ede36dd2960005ba8e846913c13f19b05f. 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/DKD7I2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48e3c24d7a8bbbd33f2a433803837f0c4679a2f8b508caa29b5621fc65cfbba. 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/DKD7I2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab50e8a9d56267374111da5d222b15924653e58a0db847dd31ec318f6015edc. 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/TCAFU2161570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f36643b8c2d7220c8a494b82de74fb3de9187383d9ff11dab121be5de61383d. 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/NLS6R1855286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df28acbfca35d1b1017abdb85d7c864d86c9e4eb50ecfd32e90b62d242e399. 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/TCAFR2193139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451fa64b7fba6a48a0debe56ce55203ad85c5e068b9a33f1e64d3f5e07268b69. 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/TCAEX2080216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e3806c2738ea30e8fe9d5dbe79b1d43fd055af27162404b5dea6df5ae8998. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME1994363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ed1dd812f0a9f2814b652bcd953e7375b8e2b6e9eed78801783b58560412e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADW1887476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1a2ffe58c59ab5de8b5cfdb3bc570635ad55565aa23adf41c785d0bb18235. 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/QMBZ92258204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb674abe420e408282d3da58891f4f5fd57f35d7e09728442bbf01ac7dfdf1f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92258216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaefdbe6fab38bf93076a8c90d16661a7c93fa2e61c64de315694af3143f023. 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/QMBZ92258231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577252ea0857849930a670904c1bbf2197f1072c019db0b3fe118557352a0b3. 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/QMBZ92258238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998167757cd00e089ce761a3854c1b7d0b3214d9c0ac06152a5877dd0078e9b1. 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/QMBZ92258240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a526372029a8e1a22f5a496249246ce8faab1877741a4956d74923524cfa82. 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/QMBZ92258248.