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 0xdbbd56b4e1c6a1794370947b25327f77d83dfd28f4d3689e6840b4506235a28c. 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/5cce452f-96c5-460d-b039-162da924cd6c.json and https://artists.proofprofile.net/proofs/artist/5cce452f-96c5-460d-b039-162da924cd6c.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 0xc5a577c8cd48d9fd4c7646d4ebfe190e201ee0e215e88d43f60868433f999832. 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/QM8RH1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36525233f305d0153fe0879acb8e147f8729926c478f72e63e767200fbb2476d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:07Z), 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/QM8RH1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6944ebadb79970baa127ab1b54b03c93fddaa0c7d19cf194ec8bb8e9690c42. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:58Z), 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/USA2P1806391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe0fd360d1ced5e98c15c0dc54ed09aef0f3e358530a75918e354ca1f69176. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USA2P1806395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce72aa1955ca5dbf34b1eb7c23c1641e2604d8400c3337bf2ffa63900165183b. 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/USA2P1806396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21df842ca82ca15d9ca88d0e36b19c7fcb917259cd6d661071c00c951f62e94. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P1806398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553b3f6e7912673eba2bc64074e8db6e3cc1f0214cd760a8d0d3289e1fbf5b8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM4TX2232233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b48738b19af7b4f5e1a17114bbb10f43bc891c9a6a82d1a9e298768ad54255c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM4TX2232235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7bc5188ff5d01fbcc9f93c536e3dfad3e3740f4d58d0dea1fa4dcbdebadb2d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:41Z), 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/QM4TX2232238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c64963fdaafc13406fa209dc112659c4cdb3b0101d8460fee29ebb2bca0e3. 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/QM4TX2427720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ba0d65c3a8978f2cdf43c79c7e6f1414ca4e578ebc3ab028c13147cbb5df55. 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/QM4TW2437923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848fbd2e9b685dee574d1b51ce94e325220e3e9d1a72a56213fb2358341e4ce. 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/QMBZ92365714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c64963fdaafc13406fa209dc112659c4cdb3b0101d8460fee29ebb2bca0e3. 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/QM4TX2427720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848fbd2e9b685dee574d1b51ce94e325220e3e9d1a72a56213fb2358341e4ce. 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/QMBZ92365714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2db8aaa548f58721685b572395a367f510117309d8aba9997dc3038eb21963. 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/QMDA72471117.