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 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 0x0755917c0d1cd0d15467ffa12d5dbfb4edc34dfb58376639420e305705f35eef. 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/2d08505a-a0c5-4fda-9903-02c21ba53996.json and https://artists.proofprofile.net/proofs/artist/2d08505a-a0c5-4fda-9903-02c21ba53996.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 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 0xf2c5e3190ee5b863d78e875cab9abe6afe6ef0471e925590631c551f2461b9a9. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/NZRI12002273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b42471ffa885ceb0272dfb8f085f0fd3ac8f6022ca11fbbe86d5b3fd90aeda. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NZRI12002274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02caf273ee8b58d285cb1646333e89c8f56b4c22050e39b71db5d6e6f732086. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NZRI12101879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f9058a290eef9649ddd51cd6088eaca37d633fa2cbefe87311ff23e7e16c72. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/NZRI12202750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7478fe85902149ea4a9a630b9ffcf989f23ad463efd221876955a81197f21464. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NZRI12202749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8526a510733e1f7a29cad44a5acf25cf2ce82996cd21e1d9259efe11f5913c53. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NZRI12300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dded64c7b3a8ce2b4dfc6e704a1bc5e762a883e87d107e662d7e0eb847bca28. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NZRI12300988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4ba3955aca2988eb78fa244a49f9c27d49cd3b84c02937260c01a54ed6a038. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NZRI12300983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8d831b2834d711e1fe3ea284ded43a6f9edfa028f200ee6bc5942269b32733. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBEYE2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aba2994cc7aef7e7efcbd05c1bd41773219b52d4ea9891a73ff4974ad4736f1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/NZRI12300984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf9c02eb5e24c44ca8226a7ffc900332f606ac92ea54ac92efa95d296af7d5a. 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/NZRI12300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c370e1a3d9984cd3c89acdd296578aec3c950a3b49a2d1910ad1f97a7c57ba. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:19:27Z), 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/NZRI12300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf19303430788e70b4ae6295fe4b200a3bc539df527c49aff78d308d1873d319. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NZRI12303139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7d035b6bcfb3c8c93f68c463f436d9a65ae11b7aeae0b47bb40e95c4c17a0. 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/NZRI12303142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5b52c51141e5c4ff7c191dd40c30d94bd32b6efe747a0bc3e5aa0104570d03. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NZRI12303969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475924d7ee46fcd1d1b67b8023fe1c2d7ade538c0bd93aa97704cac837c804cc. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NZRI12400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc0fae1addf78c78dc2227fbc8220fc62400b49c17a0dbcc7cfb27df72b69ce. 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/NZRI12400412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2b89744d937e22fda787b6abd9acbf99084c3a7a18398d39f6c3417791135. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NZRI12400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8147a18f42b4c1762df7bd6548f0c9a7b65847326193291b17251ea3ccc2e1cc. 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/NZRI12400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d033526e9bca0d7905790616210e0a50238f5dd4ae75d48ab1c6a3c47b39040. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/NZRI12401274.