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 0x09dc37a0af7e71602ef2ccadf157b5ad16fd0816036198739152418d816c193a. 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/de20a3c0-69c1-4d87-9303-50408a4736fa.json and https://artists.proofprofile.net/proofs/artist/de20a3c0-69c1-4d87-9303-50408a4736fa.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 0x37857ef1f8ff82304a40155a463fb6f07f30e023a1ed9ac83bc6c022504d14da. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZMHN2062003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dc2ec1f72623d8d6338b361405619c2a191ad7456a6f23a73777fcc7551988. 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/QZMHM2075648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d643880ccfc2d787606e746b5ab87e5a85b5eef8c012253f01f37135885a8d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMHP2028622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867af600bcb62002f3864901ec52888d2205123a92a3232155513a700d40f204. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMHN2023060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa315452824de5175de5e24946e9106b87b6e6053e9da2b60eb1f62807148f4e1. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZMHP2083226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eece801ff03808fe8dfd54ce4f5b16148a3b5e37365c7a3e7db7b5b4a1b2d9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZMHP2089311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acdb7dcfb97fcca5aa088e6885996473a79aa5dcdac08917e9e0787b9d019cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHM2028508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49c07df80eaea70b51380bcc9a111fb9172721db9dc9065b1607a3d8d95fb1c. 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/QZMHP2039983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625cd44865a26d081532736cff15ae53d1e14336b563f41196e7eccfec17a28e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZMHM2093801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6987833a41150851314d63ed0eed2c59bf5e7a117a46a30433ff41ae4164abc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:36Z), 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/QZMHP2062107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e9e1c6d55f28b8f008378d146eeeb11f62814bb733cc7a408f12514c454d67. 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/QZMHM2087855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0d70221c9df7cf271a9ef9f9a0afab28bb5f757c7c06615bc07a0b2eaa2895. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:57Z), 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/QZMHN2083923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a9da51d41a68743fb121540ba109ec2ab6ed9aaed841530eaf7dba7b4972e9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZMHN2062276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f09dddff2206dd5f56b0b07d63fdbdeaee71da2710f76f293b78ded12aac32. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMHK2016870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd11c5675cbef533bbf3187e7e1eb48b7cfce63bfb6b068c1f7203b61ea03ff7. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZMHK2097245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251f754105e2332458160a393ea691ea3caf098692992445f99023e431f6477. 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/QZMHK2003091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5bd8be3ab92afe6f2087f7a203dfca75103d0d78b9ac0dc52d0bcf3a14ce2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMHP2084339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86429b83872deb51292cf78586629272f3520fecf30196db2d720120c75750b7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMHM2045089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932c3c65fed5db519e273968fdc063b1b355213a82dcb7e32409106109199f70. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMHK2074486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fe1e0d1f5fdf6f51e9a6386d7173f350f3eb9d14d25b9574dfe266d1a10acb. 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/QZMHP2334009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e5dcf19bc169d5012a7c001d1eaefc4b60940c5538eca75381f209cebbcf68. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:08:53Z), 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/QZS642397115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683a04a18171b5d479645a7b2acdeb4570433888b747167e29308bf8e43a577b. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZMHL2599994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe336536a89a3776dc9f7fbc722974589742a82fb06eefc2263fa4a3b01008cda. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZMHP2500560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9621f8bb0bdb02a56161cb59547cedb5b83684b742cf4df08d5a3bea6062a670. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:34Z), 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/QZS652550916.