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 0x2b96c8f67bd99f87cef9d8ce19130bcdf1c5f5d9a2c28fcf4605e4d0eedfcff1. 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/984e1d09-f7de-41c4-a128-8f55def9c293.json and https://artists.proofprofile.net/proofs/artist/984e1d09-f7de-41c4-a128-8f55def9c293.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 0x0c977d1c54e23a08db305642f3c0839db3ce6b88dc52ae0fcef076f36aa27d39. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA1950845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b64d2113b7de36f00441f91a8d7aa2b66110736be04788f655c8e2b2feada. 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/QZK6P1986502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b3bc881db51dd91626257f021b85b66f8dd2e640cda31a3e094c2f77a8417b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWV2020271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b204866d8af99fe4edfbbdcc39ade7eb0fa0dee8af1c29250c0bdb6848c9825. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZRP42139860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eba202ba8a3f4781ae7269d549141d902de3ea806b8f9b73a69e7b9bb0449b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa8586fe942201a88a878fc22ed866df9b8a024c1505d5a0a7679e76432bc3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAS2120803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ecd4698a7f8b92bb7a8f0c70b1a4c936b1e223ea6e3a6c1075d58b349f4f39. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848951a7dc89e93179845c9ec5d2f4d51a195dfc3c6ae9df024d4628ea4016ca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2120805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1709098fdb68de1bebb57c0e06a26f97d89dad2a892d4c36562d973dcc0350f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAS2120806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d62c6ee471a50ccfe61e16a955002ec0a343d0851dabc906d777bf20000ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAS2120807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511a05a98b5fa1a1c658bf8e37b3771ac3f1592202df6a410a475cca36fe927. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAS2120808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd8dee1c7af3b81ddf9f29da7f40d2fa9a3d93246feaeacc5c9b6724e1c6806. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAS2120809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe33666461b51e6b1ca2a686010d66c7107d9c65c9e174fe03e2d35ed847ab6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAS2120810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b204866d8af99fe4edfbbdcc39ade7eb0fa0dee8af1c29250c0bdb6848c9825. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZRP42139860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef9682ddb20e26dab438a455cf436a7b9a5bc044cec6865ace08612cd3e2b57. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0812c8e80ef7826853278579e907c63913d2a2a17c1857bda676f40cef0a9d12. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7dfa7d7ac1989357ce75208572d7813efef8d0d76d93b7ad7095a5737971aa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bff3653c9ccdb5e70c593be0e50f0b1d7053d3f5da54d335803cb5a5980510. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAS2120814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc83a2b6d5352b43410edee550c9881bedcbbd9adf95d871c6fa5ea270a08f1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTAS2120815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd122ba0892e20e3fd54c16ed58ede1643621f36331a427af3a1618bcb3ac8044. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea0385c44eec1bf90ae076f38dc85354295a99847551b7c26beaebff045f43. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAS2120817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0045d7ea48e4ea846dda791f2080f96177f73630da8ee054844978f906bffa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2120818.