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 0x8b676fd8cb8b9a9cfa34e82a386cf855186d4c41fb3c8ae20ef0486a756f100f. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b1a6f9e-7859-40b9-9c10-e972ed9b7008.json and https://artists.proofprofile.net/proofs/artist/1b1a6f9e-7859-40b9-9c10-e972ed9b7008.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 0xc3d71a10bfc10740fb0512684961fe824efe34100b0dc6928be67a1f1a0f5a9b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNWR2280351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0bff24e2c7f0738207adce0d23deec06d3c1f968db7f589e08627481478b04. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2280352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e64391774bc05462c3be0b8035bc21c6240ddcf008d3d1d384d59ecbe1d174e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWR2280353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb918b54712cb305f4dc79db28fefe71802ff6c6b3638c3ceb611149d20aad48. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNWR2280354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b81a812b12c75d55d1b906f312ec694577d7c5636c774d83f8d8fe50ac1e88. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWR2280355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe675bafe8616d1ca8a1469af6e3bae48d0e5be9b90a9d2860d2eff96ad3ad191. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWR2280356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1aad16e5b71db64016a92ff56fea5dd9d4bde268c5a79edec0d945dcc6423ad. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZNWR2280357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1997b8ce36b0b71619a44ad08531ba7ba36ad207ea5f34947c9aa16bf0c3d9. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZNWR2280358.
Different Flavors Me No Care (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422b10b18ab8abcd88f7efc9964ad45c5da594b6e8c5a73ce2c4746a30bcf038. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZFYX2439792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7738cac412dd5bd11379d5400a4acad1740d9cd8c9d3f15b112ac95fe6bd923a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFYX2439793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8266c6bd9aca687eb483c4bd408cd253de45f3658900bfab1a4592f36b249aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYX2439795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b3dee77a91278d3f4b5b43777254dcd867cedf79f5e681652fd9f4209d74e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYX2439797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e98acbb1e4582d63cbc565ea0ef606178605eb88247a7048e33dd5dbc2e0c7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNWQ2465680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605072240af05277452cf3c7f89ab7200304e12f4b942dc7fa82734f99c4365c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWQ2465681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac01e8e13e852d7d7b66f26e9fe15a349e3b3c741b659a484f6f73f68cff9e1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWQ2465682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8c73c3aaa41f7dae8dcda134b33a730b4fe8bfb8679c212f546b22cb5fe6a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZNWQ2465683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea50b39324e9bb6a045b28f597c209dc2b680b3bd5206094353b43144f987fb. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWQ2465684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7b9d5178227c54cd47d90b261cb46f1936e8c3af459c8b9d6b2e3e84884dd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2465686.