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 0xabc9d5bf6b7bc2aeb37c75d7b7d05c7966422d921d7187b2cbf0ba8fb2de1397. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1bdbd97-6f49-4282-a44c-adec950ef443.json and https://artists.proofprofile.net/proofs/artist/a1bdbd97-6f49-4282-a44c-adec950ef443.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 0xcbdf1329adad0643f972293cb92426b101e19b8cb03874e1078769e32838748c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UKZGC2408724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97c4e299f3d871b16a002e2bda1fb206c9d2c1e9ab494f5fceb508785ce55f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKZGC2408725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2f935ea6fb0e180f6c5b04fed83ce7082c9da6ca8b19433a0c23ebf80827c7. 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/GBLV62410240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a7f2ea61d4b7048b94ce4c199298f4e904eb0b5126ecafc244f83826de012. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBLV62419213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca53fbc4b29bf54bfeb2af1224018890ceab228e90323a627532d06200631566. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:37:49Z), 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/USUYG1717791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c8afe27321bd958d0b19fc7225e653f93d6c8e292df41455a77efd01f1648c. 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/USUYG1717792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423522ab7aaa4dd275f14569d39fe58eb48138d3bcae6407383079b0acb95e28. 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/GXD7G2547888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8c6a425c9572062fcd1c9db961ed307095a3b5878d9b072f896d68fda8a55. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/SGW502549176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43db7b2615744afa475ee5ef6e78251370437206a38f46ed7a1fa1ec6b462f19. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:39:36Z), 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/USANG2533895.