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 0x702ee419bfdace20adb947a9e5d21f6c48c24e3efbb462b49fe38912d2a05a47. 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/77aee00e-87ae-4ad9-86cd-84ff19d09242.json and https://artists.proofprofile.net/proofs/artist/77aee00e-87ae-4ad9-86cd-84ff19d09242.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 0x18dd43ebd0d973d79d50f08a878ca87c343b53f4ba3a5a06674fd87b65de23a6. 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/TCAEP2036051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc5f500cda62193a5f3bed057fd86f41ad170e8dec2ddc48f12b0e5ba21a58e. 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/TCAEP2036056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c45d30eec5071549d3d0dc3ae11c9fdff63c8042eda918a2868074dc3845ef6. 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/TCAEP2036058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800cb46082ef94c705fe13dc7514d82cfed3c4f062d5a6585ab46259f18b91e8. 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/TCAEP2036063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb150b0bc248ed359b47829411a0b01ecc2de60ad765d4c2d255779b00a48aae7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAEP2036050.
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 0x916ea1323de7ec8cbdbcc32fcd180b4552f1897eebdb220c373aaccdf92d3217. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAEP2036057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec6083f3c76d91ca5f24407949b28f6fc67bc79a9436c028cbbe18eb5e3402e. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/TCAEP2036059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc13e510dd063a1d2d0e0c9e9bf6f29c00accfce14c05b68482c115c4b7c66c. 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/TCAEP2036060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1848a662f1af753927abac543fc91461d3d23cc5b89be1adda0c42f8ea6c80d8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/TCAEP2036061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a681ed9c777237a3002cf0ebea258535bdd52a7e709172236742489cc92f55. 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/TCAEP2036062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223c8c447ac116593d91f11526e36bac76304fe8117fab9accc24c8452ab904d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAEP2036064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f72e99e2eac83aed3f7210e368480506ae9280d6f02b26eff87bbd20628f7. 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/FR59R1690871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1db00476ad4ccce0b353b3202bd1b7a71b40d214bf6c2df6ce3be7dfed430c. 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/FR59R1690872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74551df58a30db26145f5937f05b137ec51317b007d57d6cdcb079687628709. 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/FR59R1690876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78444b53210aafeba483e163232c107f88a76f10542dc02a142e37c0f814da42. 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/FR59R1690877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12c8a0dabe868c96d48ece530da2676170543cd741e61faa84c154da8989e82. 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/FR59R1690879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8ceb7df10e34f8bd149270e053ed85afec6828cca967fa562b64fdcd9defe6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:54Z), 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/FR59R1690874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc979e45b53551e237c38b1f03c83d9e011a8cf567e212b35fb251cd99e14d7b3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:46Z), 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/FR59R1690878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126220f9b3d785cec3055e7aaf79f0acbb7936f12adbd70ba6adb979f3aafaee. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R1690870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993e09d27f48868ce629311ef8e8a534e9ad11a8495815f70d66204007034b26. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FR59R1690873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5ead2483841d629685964c157bfb2d8bd489d34b6a0ab8cfd784ea3df1311f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R1690875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a0d9472cd37b5995723861180b50addfd86176a7243b1639f0e943ace2f11. 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/FR59R1690880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1072c853f0c4114a9bc7aa888c9f55f6e0a3190eb07dd204d296ed34d596078. 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/TCAEW2097958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0293d0ce24b349673e3012a31fefe3a881a81e9444c974f4fae61bfc6cdb7e68. 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/TCAEW2097970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221f7e91b7771b22ff646c8a4662ee37addfdb75978d24cbfb1a648a51b7e263. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAEW2097960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd451f8b59e1c36e8474a96925701ad5d3d57c6c1c1202fd2e8da647ab051246. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TCAEW2097961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90046b6e2d3f4ca29fa5e6d46de37f1f99383bad80fb6061670fa27c539a9356. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAEW2097963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dfd2ea4a6712cf8c79215f3b4761c73d05a2af41f42c07c9fa9bab40ae0b06. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCAEW2097967.