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 0x812dd54f15f9f58c430d153ccd042d31f1e1c4f9a47dd0286ba87c16aa1b2e4a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c5deb36-fdb7-49cd-9bf5-6c58e9de1b36.json and https://artists.proofprofile.net/proofs/artist/0c5deb36-fdb7-49cd-9bf5-6c58e9de1b36.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 0x7f89b0766f504605d78ced8b01c332af88e4a21b9dbaa21d5602881a8cb591f3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR9W12545390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6713fe868eca166aec2e1433230cf26dc53f6c0b1cdddc07c3030b0edc86d20f. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/FR9W12545389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd5b12c47caca9f83f19faba3cbe440d35be604b7f8df73f6054450940e52a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR9W12547471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657f3b99dac3a36f5a571394498e5cd2bbd060fd40f31f603f5b80eaabd03e4c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR9W12547472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4a94bf18121388993e09f7cc143cf1ddb2ec1bb25b520a2f3ec792ccd2ec9. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FR9W12547473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8d45a97c63a904a6e779f7483a12243c581d87eaad37031af82feb86b703e8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:40:40Z), 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/FR9W12547474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d35864a64a873170c07a285251de434f6071a971ca08c1dcaeabffa342aa01d. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/FR9W12547475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bb03c7020bd5b6d3124a42c7bbc78fe98f74095b6bc8f6d24bbf0049007a00. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR9W12547476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce5a74283bbb8b99c04641046ad756f61872b0c34b803f799f13266e93576b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9W12547477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc44db7b91aa6aef8a6a0c3df421d5726591119e2c873ee44cb780fdfacb959. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W12547478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4c4e44ef7502aeb2b0dc81e9db785fc6edfddfdd3b418993f4a62b8e3b170. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:01Z), 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/FR9W12547479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0b14a896b96870ac2e934a14a831c56290fc7e20d8130ef7e8f365f842381. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12547481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2abc93419ff12fdb57316ce64d670595dadbeb7d8c80339266b92fe9554ce55. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:23:40Z), 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/FR9W12547482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48f8b30666bc5f6f70bba9b62dcdae13bf6b363c6e64636e5381245cf1142fd. 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/FREOG2402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16bb8f5d4f7d9e153ca5d9706caf05481ff3aa2ef8c87c7ccdc8d1bcdcd7307. 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/FREOG2402110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4a29622fc172f4baf4bccb0c92632959a3c04ee277badd3c0f375b88f9680. 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/FREOG2402170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5255cd15eba8383ebba54d0ea210b71fe66a385f90290659d29f58e32084102e. 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/FREOG2402210.