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 0x37543f45da604a91ba2da02b7839152eb9c815bcfd1998a86190874294495cf6. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/763dc9a6-132a-477e-a4d8-8bbc76182a2c.json and https://artists.proofprofile.net/proofs/artist/763dc9a6-132a-477e-a4d8-8bbc76182a2c.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 0xd1e5741b6a70693cb3c9be583e0a889889ce567830e65266962d60b947a64451. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAS2117692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe65289097176717c880f8da6ed7aa26bdf55da8b632596d4392368303ccb1f. 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/USLZJ2129836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527fe9682f51f5b904d2324347fbebf12b176d5d0ee9f5771308b3d529b16820. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPLS2185217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42455fbc16c8c7528d86f3ffe9c2372cf7110ad7828d2b71ece35c7218f45576. 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/QZTAS2117694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a31aeaa43b6c3095cac7b257e4335dd8e69fdec2836fd55a85aa6a574d063. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:30Z), 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/QZTAS2117690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe1a90f7d5e59035f7162abe087c6ec17c9cce2c974b300fa936ec237487ae5. 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/USLZJ1906513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812aa6bab55ae7559e329012c04cd39fa2ca6cb9a9294fcbb73f805c1143c507. 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/USLZJ1906665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae368ea0b1c4a111abc04330b11f9aa5ef0b48bcb3b8af8708bcafe5d813cf8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USLZJ1906671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86db1c6d2956880b81bea3df85162623c7d638896417ed82f70e1658b88e97b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USLZJ1906673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe6fe2dda78d135488941bceba011d9839f3a6a1fe0bc9b969f37d2649b91ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1906678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25266704a6fdc0413c3dbba838421001a3b3543cca6befc21862b12cc243df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USLZJ1906686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfcde7b0a917e0b9f914c48e2166ab922b5a66088d27466132bb6e8291e4f7a. 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/USLZJ1906702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f570ed6240f2b2a2cb418eb48e0cff70118e6ef0eb8b1a7a6aec31b96b04309. 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/QZ5FN1767580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe65289097176717c880f8da6ed7aa26bdf55da8b632596d4392368303ccb1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ2129836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378788411ea3cb3aed4a9b6f1124bf38224b57379bf3730c3cabfad8e032ad01. 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/QZ5FN1874906.