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 0xc760e69811134e1b0fb866216afb4d7de8ee39a619f1e62af053ba672802b93a. 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/11ed55d2-e07b-498c-b970-f348626fe8cc.json and https://artists.proofprofile.net/proofs/artist/11ed55d2-e07b-498c-b970-f348626fe8cc.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 0xea94e3ec5acbe012890642dc9541691d2c5f013c219adc6b7f56659f2a0ca516. 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/DEMZ11800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037974dd091ade9a9d1023f10b9bd0394a1889d1336422bc1a3c86704ecd1c2e. 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/DEMZ11800161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba031b63fbed9ad82cf6e02b0b5fa0802823817238312796143f2ac47c3f33c6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEMZ11800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8c5d9c8150e7df9991d99d5ef8a627356aead3d28ffa14fe368b47c32142c3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEMZ11800163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e883dbf7a43f4f8394f77ccf8093e2f8bf725281a689be1f25646c9e702c13b. 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/DEMZ11800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de88410d84bccc401b74c0a45c7f3a3db39ccbd969af900a4ad745396a6947a. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/DEMZ11800165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e538c6417e745f99c98560d8fc1d460bc3e3b859746a49f249479a7cd5d57. 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/DEMZ11800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df2d87f8090cf1b0e542a50e32ac69f32801db52505d2d55019e03097cc24e9. 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/DEMZ11800167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3db9058d8964bfa5deee6d2c07393d9ec8b5413ce5614f24c9459ce6d544cf. 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/DEMZ11800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293bfa32bbf842347d2477d915a1db02c8685b0345443de3e3c0b0a40f1abdcd. 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/DEMZ11800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10550666e3deb3e44fb9c76fed8bb0be50be647e47e345136375944ca350328. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEMZ11800171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67420c7b2f039488ddca8457df395850b9d20f82fdf82fd07338fa7844a9066. 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/DEMZ11800172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73546de7750a21efcc6046f8af31e29513e4864faceb44c909c8299e6fecde8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEMZ11800174.