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 0xa82b9e6bc7f0fa6655cb605139db0700fef09a8aec3a829621a25cc5d0ea3fd2. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb749677-a463-43ad-8744-d34c1adc35fe.json and https://artists.proofprofile.net/proofs/artist/fb749677-a463-43ad-8744-d34c1adc35fe.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 0x304ec6f643e961827ca0d42bd08cf78f5065b87a4218e2b9d747dcbd6f349e10. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JP92A2204043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82c2c6ca35b61a8d084e35f906587d84d8e951d0f9d3903885fa3ce1363d34e. 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/JP92A2204044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc594822dedbefdfce68ad9434085711d8d8ff6f785fc69cc90f073b694ed9b10. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:45:04Z), 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/JP92A2204045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537b9d7ecc5b804708e4eae946a6c22e87b4c54c7df16053d780349f2b0f1a7d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPZ922304529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc937ab485a0f3508d7a742b9982c5ed00af2251766e86553cda50a0506902622. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPZ922304530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad407e00c8f98e84ecc7ba5a7faa62feee41dc77d521d27ab064653acb1dd8f7. 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/JPZ922304531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac283f1b8bb36e6972bad44e44a9702bc7f33dd16923bb73f78c6309f7e8de34. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92A2424970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab5601b698f5037d6b1f977788e4dd94475016571117cecfb4d53f22409b102. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92A2424971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26caf4d3ba685d7c45dbf3d7b1a448300808aab535391e0f5d3fd1685855dbe. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/JP92A2424972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6ce6e0175569d7dabb1bbca3849a42d8cd587b5812e8c52d2a2eba615184a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:55:17Z), 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/JP92A2424975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4655e7e68bb9389f363533a332aad2c4f90f639449eb90944f6dc16ebbc24f8. 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/JP92A2507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92baa6a92563338f0fa0ee145bef4b0d0aec7e8f24420df0d301515a76d91c96. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JP92A2507011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837465de3e0c5546af83081172320f0e6f1fb81ae3780bbd2361b1924aeeeb4e. 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/JP92A2507012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba2a03ed81f7ffa036653de5ecdba2a0f6efbf8223e42f3ebc332832f6e4590. 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/JP92A2507013.