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 0xf64fa3487ceda9cf1126a6276d792eb85656be760798f9ee592e98b2061196ce. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0f3d921-0aeb-45bf-80b3-5d0033bbb89c.json and https://artists.proofprofile.net/proofs/artist/d0f3d921-0aeb-45bf-80b3-5d0033bbb89c.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 0x93a3e49813d77fb5575e1127bc2f7c80ef06323581bafc8d9648757db6b7d8b4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWQ2021635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04470845ec41a759982326017bbed74796ea3ae151945ddb763226298476a32a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:35Z), 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/QZNWQ2021638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db585ee6b3c78a2462b1b275ada2c198199ee188b5341ac7c12398d141b8763. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:29:38Z), 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/QZNWQ2021642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb5ac9cf58a7f807b037f1cb4540a0d5269d488fa5ad105bc048d939ddddbf. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWQ2021643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ab447af02babc3b7587b7939a65913ea38f55967fa1514d28015a20434a986. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWQ2021644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac95c7ddf8142da60923eeaca336a6760d97abcdfd535684e98db65d5af48c6. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZK6H2148631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3084da3bdc594818bca7feb0b2c6ab9be6350a332c611b93059e6396f008d0e8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:47:08Z), 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/QZZ762441084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64df0b3de6afecec647356ffedfeea91be154e1454beb97ee5ffca83fd4c4230. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:38Z), 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/QT3EX2457642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23c289d5d2cd3403c210ee55d0b5b65f2e096f3b07fe4943cb802a7701c29f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT3EX2457643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344a8e397cf37e738a7ebf83bf99bc0c8a6529197bd3beb3408b8fdfec403aca. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3EX2457644.