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 0x81553c3e6e6a375b5a03296384efafdc4e79e404fa829fb56b4bdc6d2dc7f0b2. 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/040754ef-232f-4cfa-b365-24a1d6c30401.json and https://artists.proofprofile.net/proofs/artist/040754ef-232f-4cfa-b365-24a1d6c30401.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 0x8ffd88ecda6d41236d43e6861b1a265235abb24818f27a6500b3f95668740309. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BREE20600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe378b66713a0c5cc44610eaf667c0a76b197e8c874240879cd08a95d9584adfb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BREE20600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7441ef322bca5dc4effd8536ca36c5b796f6a8dc727a04c04e3fa8e520d4d31b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BRRMM1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062e4890c46b14e9fc45a7889a93fb6e1dbc4ee49716eb5a76310dcebaf6a68. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BRRMM1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8f95af3b7a090177696bd50f06efa5628b86e384e37aab352fb03f643308b5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BRRMM1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c5dbee244df3285a30ff48485a0642844b19dd207cc1c6ba9b5b6a1a30759a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:29:15Z), 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/BRRMM2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093fb63d9de1e3f9c11726055ae365cd5b8e241b87735fef4ffbf3ee81c17ba5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:17Z), 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/BRRMM2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8436e4cf54ec1659b326e0f6819466b36197b9ddaf7f13c12b156d8461d9ce. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/BRRMM2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235bc2a757e84766f2b37949747f634353149f3fdf4b96b4c45b5cb626e08306. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BRRMM2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856595cc7f0e414fed95f8ddb08b09aded0f58b9e3b5b21e18b2407cdae81a5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRRMM2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1fc5931bd4f135aa8bc6fae88436fb12ce99c398890aa9673fa1d33b1675e9. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:18:09Z), 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/BRRMM2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb0be007a6b2dcabfa76e08cc01f9ae03126a3c4ff0de61b880231309cf5d11. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRRMM2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7e6eef2338260591cc83412456714f03fa06ecd82f2cca3c26724eb7311e00. 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/BRRMM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e516e7d4d1c81e2980a088af98da22eb0393aecdf9297d520d1c75baec166b7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRRMM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d804ed51ae088744b2074f5455314435aeb45d837f954360e4a15c2dfcf4d15. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRRMM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3df2440261fd8dd109e4add98ba863d901f6088c5a253397427b58c2267b58. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BRRMM2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4a3ae8f7fd0531cf9efd694c7ac1335eeb96a8b3a2cf4cc46e15934d79ee1d. 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/BRPFN1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409dae8d8940540373cb2f9e1b896c26e95cb4cf7957aeb628e63cd4da470c20. 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/BRPFN1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76423695da2e68a254006fadcee0fe5d139c73b29e35c5628c12c4ba29632d2e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM4TW1589131.
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 0x0834c26781eab7ac91b9c5c0c22ce32940a32e35926b350f2c78d649d4f67c65. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM4TW1589138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1cf7e1dbc1e229930b6dc30a2ce72f0b045b037d2788518d6ec450494c8fd5. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRPFN1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9106583f12d20698cb7f35436ed439a7caededb4142bfc34df1a246e7fbda8df. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRPFN1200014.