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 0x034acca5d9b00bc9f03c60fcb381bb5c4de95c7bc9a204685a6a99241a23ffaf. 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/c38df833-f9e7-49e2-9147-f9adb0cb68b9.json and https://artists.proofprofile.net/proofs/artist/c38df833-f9e7-49e2-9147-f9adb0cb68b9.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 0xf69cd9a2abcb2cefee2fbc1593eeaf21f9428d2aac6f57974c4ac5fd404f506f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:39:08Z), 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/QMEZE1804840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa79190ec08b9199dae803c2015d368b8f2f46af80bd2bc1e8c092bdfaab33. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:47Z), 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/QMEZE1804788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eaa4c032a44bd7ba78aa2b878cecaaae7303ec9ea3f538a902904b3b66b1ec. 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/QMEZE1804842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b1237adb52e4e5a11d641fa3867c612af4c3bf971396b2941fbd9bf830062. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMEZE1804843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfce3d61eb7c4905384fed4a51a9ea7524d43ab3b7fe0f6b3d77e29640198e3b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:59:13Z), 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/QMEZE1804846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58dc70380ff586b427e4b9d8744140d3038f20f78f3bcb67f9f752b20f86b39. 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/QMEZE1804848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01060836c570ff603d1b400857d3da7baa9d37cdac493da7bcf54ce13d954237. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QMEZE1804849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de69387f163dfb759e738029e1c217bfdd4d6fa724e5b31cca97649ce02cdc7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMEZE1804850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee79cf5bf597a0e1880e43cf2e685d7c62c73ce0cbc9e880857a0637e0f5a28. 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/QMEZE1804851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883f5dc5552532e3ca9d600bab6b96fec8d214d86ff50f230b783618dac1c2f9. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/QMEZE1804852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0eccd588cc6939c809f94104e1f22b1fead53aeba2343a6b72517dc17d27e3. 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/USA2P2021275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7759be47f0e5949d7956c2e63e3e35d315a9c8e6e921b33881ef0e04fd5921ca. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2P2023305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7f54bbe9ae8516aa6a66c01f617c5dac446d880df39c0c0da1c3abcf3edd11. 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/USA2P2028753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80a9c7d24de9a92822742fb9e0fbb21379ed81a3f9fdd29126f145f075ee318. 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/USA2P1950873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a45fccfda5be9bcc2e03a76f8464c83a8a30ad9911d4d0fd3d2ecd2def5b5a0. 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/USA2P1950879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f79e1708b565885619ec29a663f301ada137aca139ab80603c3533567154b9. 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/USA2P1950875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930532ba8154435f77ae54b2f194ab3a65d20afc1f81f5dac0249fbe5c4c0f2e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:07:27Z), 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/USA2P1950876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82bd08b76beada318f064d8595d9979dcb545a32a926b895c0a10aaef50693. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P1950878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a45fccfda5be9bcc2e03a76f8464c83a8a30ad9911d4d0fd3d2ecd2def5b5a0. 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/USA2P1950879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c72f95c60a26115e8abeb2cc8accec4806a283354fe0bbab76bdd52d857f0ac. 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/USA2P1950880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928e3bbb1a3e9ef62a12dc9d936f3acb8f106dd381406c0e7b9e17824523b14. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USA2P1950881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed324b13e2d964a26ff79cff5b1933e7ca80e6a394627269c0ac625c1e3553f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2204566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e65b401bd329f863eb67e62aba3d84fba46553bb932861cf6593817fd2664f9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USA2P2205925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dbee12eb853aebb7dba0941738b06c2b7d5eba31c130f1f84753b4e686dda6. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USA2P2211017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069eba39f8c4af334c41ec959b814bd4e1bad47629330f81ec58503151303d2. 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/USA2P2448767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069eba39f8c4af334c41ec959b814bd4e1bad47629330f81ec58503151303d2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2448767.