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 0xf2d76af97202551bc73e5a8d8c070b31c7f598fbdaa9180f7aa6ab574644ff6b. 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/234c9187-d1a0-4fd4-afa7-919afb368730.json and https://artists.proofprofile.net/proofs/artist/234c9187-d1a0-4fd4-afa7-919afb368730.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 0x80b5aa72e9648a0cfb06f9b87057dd99c51721ff459332a79e30e21f29369f63. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/UKRA72100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103be95eb7b97637546770c3f61289bf13d2e06b00839a8cc8fc61ea66b791dd. 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/GB8KE2203053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690b2bebf3efd6101259dae3a2c8523b6bb2a730088ce0decbb73343de717cae. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/UKRA72200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84a45e09c59260038d123f640f81ed10c464619acaa4fdd408970efa41ef814. 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/UKRA72300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2049e2b9a4b422985e524aae59f015f8ba4e8711971ff2f0f696899fc4023c12. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/UKRA72300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84a45e09c59260038d123f640f81ed10c464619acaa4fdd408970efa41ef814. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKRA72300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbadbf2b7ebeb304ad4ae1d0b3a3da04b3432aa2ee960d288a4c6f5693f86825. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKRA72300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840bee6a9e6403de4ba507ad5f9745d4736bacbb7ea03aea0795f36f20c7a965. 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/UKRA72300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfcde5481856336799d65d9f384093f4f69eed3226f28dc8be9f122a2d7ccb1. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/UKRA72300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56ca4cf0249b322a41a50fc0fc848ec619f81bb0171a4a740303c408dc17d91. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKRA72400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519581de6e179fc784d534918fa04fc0a5665f21d39bfaf0599a6e3b317af777. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKRA72400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15640ef6e1ba72acdfd2f632c0437f35a583015a821539e4bc12d2568cd24635. 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/UKRA72400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0806388b93e331ab82bd1885252148e561ad5d88a3bfdcc9ea1374154fc801. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/UKRA72400298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0806388b93e331ab82bd1885252148e561ad5d88a3bfdcc9ea1374154fc801. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/UKRA72400298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d3f4dfe20cf2372f34bc2746c186d5d8518c9cff54cabe29ca80ab9067e1ad. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKRA72400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103be95eb7b97637546770c3f61289bf13d2e06b00839a8cc8fc61ea66b791dd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GB8KE2203053.