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 0x4b0430c7b87b0c2bfaec20898c103ffd0b0fd39be3109320866a1764dda787f7. 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/8a151757-015c-4c23-820d-ab9a525a4db9.json and https://artists.proofprofile.net/proofs/artist/8a151757-015c-4c23-820d-ab9a525a4db9.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 0x26c09acdf33f2ded23c6108b3d5df8164f09b65e2e3fa2ac5f0fe6631ccf4b56. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:20Z), 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/QZDA62139348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7274bf12115bf24d229643b2874217e76f35aa3dd4c12ba56dffdc5075e2aacb. 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/QZK6J2106118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfccd517c7d5cb71bf48d8ccd056c0fdb0d2326b7685d7d6fe65fb40ee3e8cc. 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/PTVI12300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5be121cdddf042615d363af4a0aaa0056ea6ec7d15eebba73e1de85ab7f228. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PTVI12300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746143c6952ff45f2ac7dc8db04fcb10c202d40dfc3a142a01b37d2da109bc1a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PTVI12300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f64410846b1dca3832a3a28dbb3b7b1801ce589e658737aef3284ed211166. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PTVI12400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fefe1c553a32dfb02718232379a88fa7389a479a15cf32be8c3a5cd0cea4d7. 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/PTVI12400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6140f2d9ca9c665c798b830ee619e1c23993f6374c1bd16db46dc86baaf7814d. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/PTVI12400695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d48f6861dca70179893017631e9658b3d6057440bb5a118577ebc8ea22cda25. 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/PTVI12400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746143c6952ff45f2ac7dc8db04fcb10c202d40dfc3a142a01b37d2da109bc1a. 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/PTVI12300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a647135e8b4b12410e6b8f425299951b2b4cc4ff7c7683e93bcc80b69bf1f. 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/PTVI12401183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e9b6260fd7b2b14f6e0f639c94334f80f70d5f129dce26418d03f06ced4ccb. 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/PTVI12401212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb51fa5138cde70114460d58a35e4c7cda20b67763d1b78229b903ba55b4b4e0. 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/PTVI12400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fefe1c553a32dfb02718232379a88fa7389a479a15cf32be8c3a5cd0cea4d7. 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/PTVI12400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca47852e7dc208c72b806ac9217f9458aa884219555201fcd3570e1d7e13e61. 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/PTVI12401213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46994fbe0029b88009dcd34c1e132002ad33dc94d3e8be30748ad3d319579730. 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/PTVI12401214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfccd517c7d5cb71bf48d8ccd056c0fdb0d2326b7685d7d6fe65fb40ee3e8cc. 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/PTVI12300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6140f2d9ca9c665c798b830ee619e1c23993f6374c1bd16db46dc86baaf7814d. 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/PTVI12400695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd6233a0aab9cebb04767142329402be48a9778cf46a02b01c055d8d3561abd. 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/PTVI12401216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f64410846b1dca3832a3a28dbb3b7b1801ce589e658737aef3284ed211166. 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/PTVI12400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a0b3fcdaaede29d5852204aa7c1dcd2856e92b3afbd6f73f65a18d2888039c. 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/PTVI12401215.