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 0x808678c2a0ccea1a55b703a7c606ef228cf60aed18ec8475181323111444ab0b. 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/dc236481-1a80-4303-9852-6f63241d79ac.json and https://artists.proofprofile.net/proofs/artist/dc236481-1a80-4303-9852-6f63241d79ac.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 0x0999542fe280f5d61997e6d903fcbf2d86690bf94eb9906570e176ac324c0b80. 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/HKG731673114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7ab7cd2e2f9eb6571280a0caf887724c24eac9165b4cf12773e0456f2c831d. 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/HKG732422055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a6c1f6340443e0743332cc63470165283a4948bef4d7682d2171d91f876e2. 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/HKG732422041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef261ba382077fe3dd424465f5f368042167807eb4ae0e1473623237211ef19. 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/HKG732422044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebe80cb255dabdbc5df64e1c141ab0e7cfad5eccb4dce75584d14ca537d70d2. 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/HKG732422048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8137f9bd6d09d8b6b40b014d2e4fd9b8127bddb67cd8ce8f67c2cf41536d22. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732422051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761d2e26c73dc8530b9f4e2217223b250cd9fc6412d97825350ecd634f4224b. 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/HKG732422050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aafa5bbd14ef0bceedfb013bed65aeec2a6fadcad5b555ede575e9cf21b2c9. 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/HKG732422045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677474a0b41119b9e3444e0bd9287b3c71adb05b6a523af4fe38a9bdf5c4e099. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/HKG732422043.
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 0xb552a566b970da8f2eecdcf48bebcd650a3774ec9d23c08bed6493045f36f400. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKG732422046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0030e0a3bcfb4117e64bcb408614d2e6e7cbe9cd70d7690596730fdfc04d48. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732422042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929841fa80a8df93a5708df588d2b2d4a50eaf99c793b582bf0e8309ae94c7cc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKG732422049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4aa9662e6a9ed6be2fd15e2761efdeee52435f1d8d8e15e8a856d791997ff7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKG732422053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f85772c6649224cdfd3de6fda17ee80839b7d702f6ccfc2ecaa7ed405c833f6. 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/HKG732120610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d99c3125abd1538a1352e6fbdde71d42e9cf67fa5eb6b3c0394b901e0a1108c. 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/HKG732120612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a9962316ad80cc667b5ffc04ba94758455bbea6173451e8367c2e32eaf4d17. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732120609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef85fb7549ed62b84ed47cc0afeebc532ef6234e4dfa7456d765cabd0adee54. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKG732120611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1efc5458f3376da886ea6c6f3d483bd9c83120f5f0075fb74801acfcb862022. 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/HKG732120177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1046c40d495973d20cdca781fb5070ecd31c39756f7f0ff7010991221c15fa. 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/HKG732131620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023e5e3dbeac3d5df5418843983bf40b48fa2485734dd418986a4d2a387221cd. 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/HKE022234769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed31165cef9798c75aa6bf71bf8619f3df1f61af617483ecfad5268e6627a2e. 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/HKE022258010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94056f1b4ba3586d583491cc36070825aeec469748d08c906aae835e939827c4. 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/HKE022234724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63799262d15d9c9f03ee1bc94f2e2fae1259020f12156b15707e1f3cd147917. 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/HKE022241352.