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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37459aa1545492dfe89fd56b277a8833830fab8fb89022051da50e59656bd4c8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f68ad45-c83c-4527-bb4d-9b5cef62a093.json and https://artists.proofprofile.net/proofs/artist/5f68ad45-c83c-4527-bb4d-9b5cef62a093.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b1f18db1801584043245517aed9681e8334515fcd4843ef540cf24cb140e14. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2343231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e0d25fae21bd27c79176da5118bb71c3f7ffe320cd0f9307a44fd8f28f1c1c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBKQU2343232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f211b87d60ef9a8ecbebabf5424da55a01786d81856f3c19091baf72f534c3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBKQU2343233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2acc897d9a1fe2116501a9d9146aec7aa69c1f14a4070276f2d6a8369b91a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBKQU2343234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72f6298b20883263e12a810aa495320442c2eb921446b24e5cd4a0dc67b4243. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU2343235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ffc6d13dffc62041e7dde1926edadca165956138f63ad5fec12efc3cef321. 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/GBKQU2343236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8dc38c05e8caab346273ab4fe2575ad6103aec6ce37f18eb15b737ea2848bf. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBKQU2343238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be92bb544f349b34f58b210ba25f5227950ece424b0d355dcdb12a3bee87a3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBKQU2343239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dadb02189c109dc8a032cb3ecb5f01a9fbeb83b990d629d9a26c6c67ecb601. 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/GBKQU2343241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ebe0f12efeffe01cd09345e8cf033eb16ffcda813bd57db8527d1af0982d71. 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/GX3Q92348568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd1e3c4d401b02a651db514d859f89f1206b4d7fd536d5e8aa03440108c6d5b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GX3Q92348561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd98269318e30e9d66d82df5f573b8088c86c4abe75c0b90ca417bbbb4156b1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GX3Q92348562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528895fdb416a2cc9015ca8cf1885726c55217f20c3507d98f1b8fa74848b061. 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/GX3Q92348563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950492c01d7d415e2ffef2597c10fd81fd72f9f4888bfddcac87010786768eb4. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GX3Q92348564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd04b74569a18b2c50d786975025017e11d3a455fe942cfb94e24871ebd1577. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX3Q92348565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1155d60c9ceeeef91aec46c2bb827bd9eacb637cf3b2be354e53e10ff3c7b9b2. 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/GX3Q92348566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9abf49cd721391eec48cc685bac16e679e290ceea583dcec4770c3191d1fdd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX3Q92348567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c037f45575064789deb28e7b031ba4bbbb31604974aa1674a85420f6036066. 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/GBKQU2290886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcde1826569551b21275dddb5b2c734e0881ec9c8c3e1a17f686abaa2cb339c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2311964.