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 0xcc4cb563f2833a6b389fced6c4fa693e0bb17aadb346b636706933938d32cf0a. 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/da65f7ad-6d44-4715-8836-2c66b9e1cc94.json and https://artists.proofprofile.net/proofs/artist/da65f7ad-6d44-4715-8836-2c66b9e1cc94.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 0xa7bb2fa6f21eace4fc9a89337146a682b74ce0cb3bd53d7d96c3351d83652844. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:31Z), 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/GBLAZ0500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa63260c86c33f970a78e1c7bb39adcf3bfecd2edfdd22c3c3791846177c3b8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:33Z), 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/GBLAZ0500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2e0a3dbf5ef90c83093f722eb6a601482b61f15a315c61484f9561aaf75b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBLAZ0500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4747443e46b4ab1b904c87fe0b9b01e823fd7b69d3dd915432c72d5eda01e9f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBLAZ0500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd2ff7c03d7e8827f1f4720cd74dd7fa2ac357db9f9d45b5beb811da21b2c0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLAZ0500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bb2fa6f21eace4fc9a89337146a682b74ce0cb3bd53d7d96c3351d83652844. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLAZ0500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa63260c86c33f970a78e1c7bb39adcf3bfecd2edfdd22c3c3791846177c3b8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBLAZ0500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2e0a3dbf5ef90c83093f722eb6a601482b61f15a315c61484f9561aaf75b4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLAZ0500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c58e1b58f69a0c4774c72a18d34c36812c048b2d8b4a0d50bb334aef05d16eb. 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/GBLAZ0500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5239f7c1799cf59937306bf174397f9eabc49a3a455e99491d3d8da4cc70a689. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLAZ0500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2f8456d1da26b2d8fc13ddef3e5f8486d72cc89188d26a9f7ebbcb4be0ab80. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLAZ0500227.