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 0xe114546f65341d623f70142c045b24697153b28c5d69f637e7377b1b4183ecd5. 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/d2eb6716-9796-42e6-9eb4-7b901bb5b772.json and https://artists.proofprofile.net/proofs/artist/d2eb6716-9796-42e6-9eb4-7b901bb5b772.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 0xe9d96728afe440222aadb52fcacb600fd5035bec83d16d6fa3c0c25312931b4a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFZ42513789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33099b303b0aae3d082a879f712b4b423f2eb67789b775feb4e8ca5b878da0b1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFZ62541348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808aa3275c34955aa624b2d42d4989e6e44a9d8e0f77b730eafe7588e3dcc1a7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES92527679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3584f17877538024e220042669046280d350ed52e3c2c744216eb073027c88. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZES92526164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1836130406c2731da7cebca8720e5fce971a1b2dc81d54c22d7b38d926d501c4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN92576019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3584f17877538024e220042669046280d350ed52e3c2c744216eb073027c88. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:04Z), 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/QZES92526164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1571a9d7a2a26fe67e4be9cc4bd58968ee42a25fe7adaae46130713533404e7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN92576020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15448ccaabee0d7cc3591ff7c13212ca4607e43ce2c08aa206be47984273cefc. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHN92576021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33099b303b0aae3d082a879f712b4b423f2eb67789b775feb4e8ca5b878da0b1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:01Z), 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/QZFZ62541348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd49758979f93d1845c636f6a1df61112d8ea73e8e791049520ab49a0c443d3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN92576022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfdf6f97ef665ae76bc0ab3653b2bc900d105c61088525dd10bed7b06f28b2d. 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/QZHN92576023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4add6807a66991e5f80b46b17df324bfd6d37ea6873afa3d16d241b30ebe02. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZHN92576024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d96728afe440222aadb52fcacb600fd5035bec83d16d6fa3c0c25312931b4a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ42513789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650cce32c73b3cf46290da8c43d18667d7f8eeb2618765284d44d880c2c9faef. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3EX2545142.