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 0x1e486d7df7945d93e4a741b3cf780c7a246a046b365497e707b7f306726c7504. 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/fd45aa41-a0d2-4f3f-b257-682de7ab535a.json and https://artists.proofprofile.net/proofs/artist/fd45aa41-a0d2-4f3f-b257-682de7ab535a.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 0xf1467fa0241d3e8d6abcbe03fe42777a16e7f564b6c9c954b0a61d6866137b00. 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/TCAGL2276243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622afba42b8c4c70c4107fd720dfd7304d45d0b08ee3d6d2a999faa29f2c04e5. 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/TCAGD2265683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdec1063ab7f5fcb774382f74b145362ad73491a961a0a2a8905117c9a8d19c. 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/TCAFK2188329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d970412c6fd60bd8ce12945fe35f2ad6909183a168c5d6d4fd19bb5e391dc5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCAEY2040602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62c9a71b5ead22e998f65578fd06adbf4b23db43d937d94f09eaf37503cecf. 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/TCAER2019700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcad84b33ddc34e05709bf0647bae4202e8fcaea589956cf8234cfe26e15d224. 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/TCAEN1991063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e944e1991317923b60d1f8238a1fdc2a112203074632d3cd69b09c78fa495ff. 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/TCAEL1925459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77162feb27407058f2be4a69f4fb6272c4bc4a2287475856dc002dd7de9dc09c. 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/TCAEE1933488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184a6de167e3bf41196ae944799a82eb97a1f7e9a18c9726162cf27f57eb1fda. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEC1953890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417a8b620afbeb92864a2e4b7f15b45ba0951cfd337fa7838f61dad8713ee961. 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/TCADZ1859920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dda74e9a9588130e68bbd760b3e5522e2ad41c99d4818f698975cb5c177c2e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCADU1861072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898b2cb3648ab33001dba764ca632bbabaa1253c9491d5853c9808f4a10690bf. 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/TCADU1879328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0bb629171d733a83aaf6971f4e8302fd27b14c67771c5cbd04cc11484e3225. 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/TCADS1854889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233772d49259816eae50e2962d7f7f2c2b0017b9145adb04b54d399cad13689e. 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/TCADQ1808395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f3f6d3435d434cb824341a71fed99a91b3ac64f46b9335d54f2c295bdf0981. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADO1845827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71ec2231bc9fb29eddec9cdadff845223f45bde342b9fb27bf8f49a3b06b38a. 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/TCADN1857212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf48a29af9fbd99bd45014760575f06d2cd48f1b3ba66bc7be947426019c2c08. 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/TCADL1888130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae389ca1d37deb999bb5f402d085b8356900e80b2a369d737635dd2e0c9cc38c. 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/TCADK1896755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44298239bedf1d2468d42cc3579ff2f17638eda4449b0e492bd3191dae01d9ea. 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/TCADI1712588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d478dd4736b10ce3f82837f2cd5c1582c009f0fafefe5aa1d690de7a1ee472c. 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/TCADG1796441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4e292d57c85f72aa2759cb2a15cd112a1209b947d297ce3751a43fda7ccda9. 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/TCADD1735483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f178647c8f08a30932393b4e0663aad0f29046670369204ec099e8b3231ed5. 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/TCADA1781201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46678cd5525866799ec3ab3991b34d9ce1b8fa3c916edf8709cccf92af34588. 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/TCACZ1700619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37fe1aec14c7300aea5c6b8612008f76fb440176c7180da6f847d3d8153784e. 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/TCACS1683826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f48c77ead5d299ff8a06c2b12cf0b7dbd67ec7b214f9b24069220aa2d38f21b. 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/TCACP1637396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f72b5fe19028e015a0bd2acd93829a119a7dd3d01157cb8337811319642226. 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/TCACO1617379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e732becd8b6bd400651fdc9b69a9937d22dc192bebae84d3d332cc85667abd0. 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/TCAHZ2427936.