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 0x7fef72ff826c82bf4146ee025aa7b78a3d96115163cfd1c7e86622af2848cd5e. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2266ae0d-698f-4abd-9838-d36aeff89ea8.json and https://artists.proofprofile.net/proofs/artist/2266ae0d-698f-4abd-9838-d36aeff89ea8.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 0xb2bc66007383d16c8e699d7e0df1a8cfc5709b60c36f677a92a326389e2f870d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CH6542191498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a2b24125bcb5a94e9f8219a1a017796897333eb27343058b6096ad9c72dee3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:47:31Z), 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/CH6542191499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fe6bc75a07709454118c009e649c2de2657b6615da521fa2291931287b5c05. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CH6542191502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8c2002c12c5d8e7673abe4408958ff8c7df05524d3d0459c331ed09c3c3345. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:21Z), 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/CH6542191501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70956b9e9dc1ebb294c8e0cf0630bfbd43fdeec7a834de7deee901045de13303. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:29Z), 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/CH6542191503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5cfcd00f51d9c5d5737c337a799027930d9aafe58d9ca29e0122e505a7056. 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/CH6542201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe35540b1636344a81724bcfe5058a5b3c92811430311d6ba532285e754d63c. 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/CH6542308996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85f2d3c0ab30e48cbbc66fb124f3cc93ddb3fe45d051636aaeb15703790c754. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/CH6542309082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb945c1561e27dd0b42614c4cb972d17f3123bfcddcf2207754b4c896da42238a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:44Z), 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/CH6542316680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a7de15055cf8b5e95d7ab9303137bb4bbe9686d78b72ba0fb0ca58a86a2866. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CH6542334023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c88b4024bca01c2823876d92112215c3d9b02f059db60d592d5c32140fe1ef. 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/CH6542362411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13dfab1bd7317a438803113f9f647e2e197c88e0bc8c6123b9a6bfd21acc5b. 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/CH6542369862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0676690a629a43b56aa0b063e6e573f9f9e6a6ff9ba4289808326036dbf1cbfc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:05Z), 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/CH6542373886.