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 0xd6bc9687a24bd7baaf28e621843edd1920b8fa82c9fa1e6522b1a9953232c808. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/470c59a1-543e-492b-a636-fc459f7e7045.json and https://artists.proofprofile.net/proofs/artist/470c59a1-543e-492b-a636-fc459f7e7045.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 0x394265ff7af9c8057579842322501987b22c08a65d6f71b69c47174561021fd0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6L2363168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96303003cfd3b4dc7b18d24e9fc463faa180be91948a28a25c33015a6c751ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEQ2363336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3549380d3d3ae238cff5f11750b16fcb34388ac8478834fe93525958c544ebe. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:19:27Z), 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/QZTBC2342124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1388bb5b844f82ac7b1831812b851b75b83ba3861c284c2ca6d63a825becb742. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2342125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cb869d4f8013eb76861be5a1d10cb82ae08846f6be92acf6aaaa574e71f80c. 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/QZTBC2342126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf38cf2768e30ee7c97ad7c9b2c46254bc54d70f64d5fcac36f907d51c1e4b0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBC2342127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be62e06ebc2fd100e16bdacbfade27b65d910afe5d95ccc7ee649a5f95acb36. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAY2363858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05765976691cd3100f118b5579544d749e6702e3405ba76d86be9d2d6554c9e7. 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/QZTBC2342128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f028b794e89d847b3445cade73f329998712a47a037928c11b5b50d3a0db4e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:29Z), 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/QZTBC2342129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ead998f87f87cc6e1b120c2e687453d1a93c1672faf62a50e5048060499c62. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBC2342130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a5f57531f8784a8e0f7179d7be293eef13fedfdd70f193f695361a336dbf1d. 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/QZK6M2430385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b61fa8ce3c612590b0adac4b41114b99d4128b972bafb87bf8f9cf33799643. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TLVEM2473983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce24cd3f196d95ddeb9efee75f97fd5488f0433b71203b558c3a87f379346f7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT2VB2434385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d61a786b148e304fb8185cdbf103c4e966ca50151aea380b6f4e009776194cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPEW2529476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba379915fa9e105a8fca11fa47afd6ce47571b685064b0dcd5e823d554e9a2d. 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/QZPEW2529477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819392b465ea9447cd26e839b4a0285822165f0c08f6b2fe22d6b60ce88bf05. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZPEW2586627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c5f931d58f47c038618797f1d17358dfde5904ffaff9e98e837d2a1fc36dce. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZPEW2586628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c437cb503eb56dcfe610bbf4c203cc075c8b8385160d8dd8f18680b5dec86c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZVEM2531573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9dced0d20f774c65ba90e36ed1dde1dd6382c8a95cab94ab524e54fec38bc7. 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/QMBZ92590451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde38ada92b7e9f7075285c5836d1d44d6aefbef3bcfc081161420ac9c7aa5279. 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/UKN492403009.