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 0xa432bea90db16a90e293e690654c9458b8108b698bd8398559d5abcef9cc90bd. 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/390b1a9b-0d6d-4768-9484-635205b6f8cb.json and https://artists.proofprofile.net/proofs/artist/390b1a9b-0d6d-4768-9484-635205b6f8cb.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 0xf47861f0a0e47bee9383d9c045a2d50b72c855d10a79baa924800a7df104bd32. 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/GBBTV9200534.
The People Tree (30th Anniversary Special Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9640903e6eae40b9e88b9908de5d78b04a53cb27ea4ce8f4c8f041cde914ed20. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GBBTV9400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c6a696da8e1c55bfc96759149a06c49122b92e943d495598c8bd79b4088a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEG931490990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78da6521f6e2b8b84c03c147c6b235b6e04fd74df918b4432faba06cceadd429. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBBTV9500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc278a328c5c7ecfec874de3db2f4e0fc96178dff0a4b4640636a4162124ab96d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBBTV9300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4f29f89f527aa2de1fcb0c8381a164168d45ff324afbcb68bd9773bb6ce36. 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/GBBTV9500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe722c08d6b0811f36ddd7ab6fc71fdfb48aa05f8cdd0f8d7e482bc02f4a56fd3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBBTV9300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d6b4aa14862a386de8007bdc79f4376c4ee538a05be90c5505c776b3c6fe2a. 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/GBBTV9500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa699bf570c8458f60adebb9a49c9efc4ae3a02eb0bf54ff2db371ffa8d162ee8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBBTV9300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031bed7444ee5e781be60b017c63d8d09c3754f26e9f7be6c794a6098c257cd. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:15Z), 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/GBBTV9500455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aaa993134576119050f748dc6f353ea8c1d4f48b6c3749154375fb36953d3e. 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/GBBTV9400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f1ad862181ac1b936e2ae566985526f75d2aa2b6c96b9914abdf6aa422c67. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBTV0800868.