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 0xa3e41470e380ce3bb640060bb307b3e1acf7e1da452e54da358259ebc25a43a7. 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/e807ff2a-adac-4166-9e67-b030d84f6af5.json and https://artists.proofprofile.net/proofs/artist/e807ff2a-adac-4166-9e67-b030d84f6af5.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 0xfe9b1e59116cc3bd4f654b73f6b9e0055ce741fae489734cdb131b3c5b982024. 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/TCAEP2024517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc521a16063f5acbefbce062ac95a8369df1e7226c3fb9a56a9f30ae88ca0f363. 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/TCAEP2024525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffddc0159360d79646ba392ed99daa921db916e6c95e1938758cbbc1dec60b27. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAEP2024531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d40f7d6f63a24ea84c64999d633c739d741595ee0b5590115e7fe79d834f789. 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/TCAEP2024536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e26e1d701703ef4101bbc00d1e0e96138138974c963ca3ffac17405ba0d7f1a. 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/TCAEP2024545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb40a4c4d94d26f12e76e4102db4895e1716edd58cc10bfb7a22652a15b257. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:07Z), 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/TCAEP2024519.
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 0x17e4cdedd7be06f15d0385783dc46e14d8c2a46cff95c1d81310d01f4c319f42. 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/TCAEP2024528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc062295a65ca8bbd61b9327ffe4509533f5002419e532299084fae80325148d9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAEP2024539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bd09ff557f12f27cc2f305bb0f394e95a8077ccc2d55e03a4265f09280a98. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM82484470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2590fa8060ab8a291e0c46be6a1e4ac4390c1d586ecb70441de3a5eee880e989. 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/USHM82484471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97755af7048df2c211a2a45e8c24c4911c7f4f1418f43020c5097b71807615a3. 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/USCGJ2303822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ef8c081c060a8974211af5d4a514cb4a2895dd6c993be7c83a260ce621afd4. 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/USCGJ2303824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df6dd08469c97036949af48c46c2c8069ffd6919e12801c5e9a4696a7ee09a4. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/USCGJ2303823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbde9e1f2fe5abee0585f0663daccb636330e23546c1a24e450b320b100939f2. 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/USCGJ2285288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe003d4da83a44aa7fc3cff71848532d57505b7d1a2fd25cc6cb0ee03e93cfbea. 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/USCGJ2285289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114eac7a6a950cd4999db6f391e70ead70975b531f19472dab44964d5af64aa8. 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/USCGJ2285290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0847d6a72780b1ade4bafcff2e012b002056be89ca95436607eed9cc4cc14e6. 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/TCAFM2198768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27592f10863fc69f9246057d107c2e074b367298712bd695474627c3b16b6760. 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/USHM82079181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61fae2b86837a2f2a00e99b439cca6bc09709103094e3e25c3d1014161522d3. 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/TCACZ1760329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fb4456c16b60d868b065d55247ed2951a27ce262697a40368688255e055616. 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/TCACZ1760363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47618488fcb3d188e6aac0a37985156f859c7a7fba022066bf2cf910bd8786fe. 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/TCACZ1760364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162e39e9c112f673ea9fe7dfbd2463dc914ce27c5f0ccd72d5e48935c03abfe3. 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/TCACZ1760365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04465092c51763d6ec6b3f7fe6bdc51f37076d277af3002f38b025ebd1ec3e59. 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/TCACZ1760367.