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 0x944dedc5317a5194e7746a8ae567d44397cbaccb08e3b00db218e5bc3d98cbdb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e748b91-a796-483c-a7c6-10b6a1b3dd08.json and https://artists.proofprofile.net/proofs/artist/7e748b91-a796-483c-a7c6-10b6a1b3dd08.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 0xa43253cc59c3a914c46931d5c7133e8d05b21a1e35c283abceb4d2290e0548e0. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:11:22Z), 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/TCAJR2562740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21829207d66e9d2d66a5c115e982ea121e23af46b6490570063106212a7c66f6. 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/TCAJU2592331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a6b5f5e062503c7fd30b6c4c87911e2d21835fc5db3c7dbcf1194f6e06151a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJV2501629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b00761c85bfcbe0c960465f4e895199b097d7c42667c137ac4be8d5eca0d4e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:56Z), 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/TCAJV2501682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f13a4913db90b7645d8b5978ed01ad43525e8101a2817b8e057c945f7bc15. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJU2501657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a607899a4a429f6908a0dc62cf1d66a6ad84a0629532e3e85bfd2f28fff93f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:40Z), 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/TCAJV2501726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2b2f1ac0998c595417655697554ad6e46e0efd75dd8929ddf096cde9de944. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:30Z), 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/TCAJU2501612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ac16c66deae76d4bb3d15924b438a9ca4489c617ba491c52dcf36e09e6ca5. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/TCAJV2501673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1cbe0a99a8181b5868007d388c1c540db08dda1f470786a64cc9abfddbcda7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:20Z), 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/TCAJU2526451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a97ce5634e42dd809c3a3e8d13e5bd7ce95d28abf738715f8ab67ada1918a27. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:43Z), 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/TCAJU2501698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b059b6c1520c75f2330df47de3676d82a277a7f32c2d72901a328702bce96c. 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/TCAJU2532676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18bec1c633478750b4a1672b9d7f66db37ba2a952472f04e92fa7880ff1af1f. 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/TCAJU2532650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a1ecf64d88c9fd19cc85dd02553421feed19344077dcf386f54ed353a382bb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:40Z), 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/TCAJU2526471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51baebe93c0c6a00a3c7b6e247da625e8ea10aaa2c9dbccf0ac975992fe23148. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:57:05Z), 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/TCAJV2532707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b33d83afb316dcd163295f5235a3cfb95ede78c408752706896feb1c8a6b4e0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:34Z), 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/TCAJV2532619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33f30d9f584d2a203e2a9ebabede8071eedf5eea682088711e853f94e05be4f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:40:58Z), 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/TCAJV2551040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e9c7f48dfc45f07b095762e89e5bf7a7c36d7bab157ebe616e7d08a2a60f6e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJU2526505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2687f076a5ed34e68557f8d5d592b0729e75d63bb0cd33e9f0477a12e85c3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:37Z), 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/TCAJU2526462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8784d7b70e2514282ae2e72b68805098a604c9d767e9b56cc4cf628c02df6d4. 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/TCAJU2526518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92e409abe79f74a3a27896e13f256f72428fe2459ede45217e5cf932df9141. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJU2551014.