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 0xaecee30135e281c6e1741119e064ccc2dbae85b66e865551080aa200b44dd778. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/304bc87c-86de-4d43-bacc-1780aa9fa061.json and https://artists.proofprofile.net/proofs/artist/304bc87c-86de-4d43-bacc-1780aa9fa061.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 0x703a9e1860c43855a78d2c831e2b00b99f86438898a6740bf4bb01a01e5a4a91. 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/QZHN92295722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee8613987bf7fad21e07c6225fe3f67df7d8030f7d124bf5e5bf444ed3805d. 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/QZHN92295725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58324f9b48988ee1c8afcae6e3ef46918d2e894df3eb79f6e449e482b5527eff. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:49:17Z), 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/QZHN92295726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c58e36de81558cd6b4c74b48bfb8417de93ef114d9443068f1023387c8fd36. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN92295734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745a2a887111eacc8b55f4570f0c66eaefda4f87dd3edffd5c6f867a44693e57. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWR2268232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113b99c1f6510ee4c2487a66ba1e31f0880601cbe59d228dbed35c4ff4afce7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWR2268235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc102477980ef27e71706b4b70a59811692ee7a4bcb463f42793b55a7a752cb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWR2268236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8282aaf11be2a17ba44201345a0447cf7225b823c126321be18a9ec11328d3b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWR2268238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061b86e76a61130dd16d9dd82b6c9b851625dfdbeb54c0ff56002782ac7bedfe. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6J2371433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282016de7418f8f479b425a23c80e7b6f6161c8ced0b28c873e40247c0a3bb3. 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/QZK6J2371434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3a297588fee6e01b4f8e0cfea2f4fbab2e313c7f50f3dde9455a8f1d81b4cb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6J2371435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3104a59e3f6c9d976801e0fe934713f5781a176bc44a3c29f0e9dabe68e0d080. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6J2371436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889708b4137004d80212ccce80ad617725dcab343fe615f99666f900c4598c63. 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/QZK6J2371437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc861d6479eebe847e072c996b2cadf509f302606703432b4a8f32a14be35e7d2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6J2371438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bbcfe191e8f57101e074068c615cd791e4a302a5e122df5d333930712ad1d. 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/QZK6J2371439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bd434bd433ef7af8d1a357025365e9e765b8294410b6eac8ce48c73291c42b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:54:10Z), 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/QZK6J2371440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba71d49a7cec1801806f52d8b774ae9136d046987bc17558bc922c392f542584. 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/QZK6J2371441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4c138ced2f948a764e04c17aec116e1f3e40ad20f12e2c5ac5c3d2424b2206. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:32Z), 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/QZK6J2371442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1451fa0004116daa1fe38cc0abab1623ad5f618cab06d0549a976bd85ecbc7d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNWZ2491458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc133952ba2952e8fd3c5cc8e969b9d3bf0d10014a07e243763e9f02db6b1447a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWZ2491459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82040c6749bcb7c71b5ea6aa0bca0caabfcbfca9b5dd73e1d6e64a1e0efd8722. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZNWZ2491460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32a78852e2ee1dce8ecec2ca7721a9384986c114768f74305fae9c243e74019. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWZ2491461.