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 0xee1b60bcef86990b45637866965b9c89b22436634cd53c3164ad8043897e7bec. 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/a6fd0e39-a3a8-4ded-ab5e-c2075d9e5955.json and https://artists.proofprofile.net/proofs/artist/a6fd0e39-a3a8-4ded-ab5e-c2075d9e5955.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 0x668541fe7bd79cf5435e94ca4f043a3b801a2060d7060223a8658137249699cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ52145921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c882f17c46afa181ae32ea91d7a88b41de2ab0b74a2867958526e2267a268. 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/QZHZ52145922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd3cd1fd62f8aac5b9d9f561832e71653fa6fad4c7ba4747903c2dbcee88f0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ52145923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600ce7eed95028ee3dd3e4f07144d2fdf696d612b71fc022c2232ab44870ae08. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ52145925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15b5f9943b6fc4973e4f239a73166e0bfb39ef9843d2fadbe2f5952352a1310. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ52145929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce11644021e032d8fd52d9a0e8e088e9050f5ca552ed726d5960fc68d22dd37. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMA22013985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cae8ea32868aa22e4a3e0d072d0d926340657391703f66d7a6e7b0bd551cee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMA22013984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c63e40a59a61ab93bc55effef540e800d0fc80e667630f8caa166ff7d01fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMA22013894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7648c80b2f82160975019a315e174c7d1ec8a394478d682a4a10e310408de3a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMA22013982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b2a3ee66380ec398d9d98b508d3ea07de4b48ee1934d48377be74d47cb20da. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1976136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8aae6f7f33fe05f3e1050a41fea45d6da9bcc7f8ac1c791e8a3546d386e60. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB1641286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f20f91926299ed96a2b7979555fbb8edb9147843bebc4b5ff5ce38bbd0af0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB1641289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486881644da9dcd6fef82958728e11e48b5955d980af9f4351c458c9da90d81a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB1641296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf83f8b95fb0f831fa81ff74380d76fa72b0b0f5718ca7280b26dafdf176af6. 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/QZ5AB1641297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c5ecf5a464870b3fd72480d8ea484a8234521ef68a99a427d96734ca53cd7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB1644332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab610dbfc3f81acb5b525260a72f7362e9d51318db43a0f03a801c7d4b42d6e. 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/QZ5AB1644333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb948c8a1168a46201be3f133461f44ffb176ec3e2c1b18e3ae973d2e572b2bd0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB1644334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc091cdcbd2cc750facc8a7ac13d8c1861c1c53124504292a7dedfb12b5d292e. 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/QZ5AB1644335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ccada67596573e1f154bdb96bbb79e9712e0883d36a2b23bbb37cec1e520f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB1644337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b51d86041b2f387c82020f0dd5fe519a1418d8bbb14c75415557970c35cfdc1. 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/US7VG1678008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980a1ef06b65e46e242ae08b3079a480968d0ccdd3ab00df66ae4fcf86e989aa. 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/QZ5AB1644343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73563d09dd7d001f53c99a607941d3aacb0913d6f685458df6f9d1c68f349c51. 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/US7VG1678009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d64c7295e4701a14b129a328d1f0ab16315d3aee36b3b997a4048780b027ec5. 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/QZ5AB1644345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410da6bb7316a4efb208faefdcba6dc5d60fdedbe659453f9faa8c611f65c181. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2498466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb48bab01eb40c6e98fa1455a1a13775958fcf70a06e5b56688a59f52920c7. 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/TCAHC2357798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8af6ebdb196160a4d0b304a8bd37a308329d5e1973379f6f9330d62e06eed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB2365613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3942c1397ecab6e7eb653257fc5794d2a36d1e880d6b7006f22cc3d1a341fadc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5AB2365615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b719f284b413ef9ce8eec140a61cbe2e9f6f4e3f7820104cc14c69fd5fc44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLM2212523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78115d9dc1b845a5127f3912b3a6fdb8bae1b452b8b96f40a1c6a3995b60f760. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJW2016097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d6784f6d7aa18882be784cea522a3cbe9097461d50017a8cde1dbd5a5bb732. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMA22063777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2334187e615c1c18a0087ab7af6ef117033aab40644e4d2bd79693ec7ca5105. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1738115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169110a95c4e307d63c215ddb6e69ac699ab98114e7696afb6a5e02bb00d6f33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1674041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b51d86041b2f387c82020f0dd5fe519a1418d8bbb14c75415557970c35cfdc1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1678008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73563d09dd7d001f53c99a607941d3aacb0913d6f685458df6f9d1c68f349c51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1678009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0be6fba2fb49272c915e45023d8e7e73c89c98b492b23340b1e43dcdaaed8d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ5AB1705550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1103ea1a638ae76831f30615cee4639b39499369c55a5388bfdfbfcfe2cb979. 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/QZ5AB1705552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82257369a4bf3c1505f4cd097c357a7863b0ab9f89b75e91625ced672c61215d. 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/QZ5AB1705556.