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 0x39a682ab8fa50c4b83db625807ce69d10b0364905022101bf94aedb7277b3c11. 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/c244bce6-9894-4ad0-80e1-4c6a8ff52e94.json and https://artists.proofprofile.net/proofs/artist/c244bce6-9894-4ad0-80e1-4c6a8ff52e94.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 0x5ad6dd26bfc89d52d190c8592f3d1ef6c8e38e117115e6461a6701fcca412dd6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR6V81751696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997d8f10a4c62dd7d5f164fe081444aa85afa141aec5a1abcac178ed23d2feed. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR6V81751701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f274a748fcc881c3cc718c495a88c5f6bc2b610a8ccf1659ce20e3afcdb6773. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/FR6V81751706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff316aa2e5257a6edc66ff5ac82cb7d5a8061c0b731c63e4a7cd7d7420cff01. 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/FR6V81751707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08a492d4488c39aa784f297f13f7bda1395fddd120ece5eb1b57c6c72f6a634. 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/FR6V81751709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f93cf4c575a8ae77c697c9aac650f52ed5775abe09f7ed2d5da062c110a9b35. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR6V81751711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c513426928b6f812aab2817ac09227f54795e0feca25a7bfb717743c409bb7. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/FR6V81751712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe667d1b01f64b4a28c0a695b3659471f8cea2c76e12e65e756bef179583da92e. 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/FR6V81751713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47250fd322bc1486f16e86bd400b48ca37fbf620b800e7840aec76696d87d139. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR6V81751714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a602ed0058b44eed977c0f0dd0ed9917daefd697a118b4c81317e13906410. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:37:06Z), 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/FR6V81751715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb572dfd787b7b2844c42b356212cefbec56e822e4c09b33411462f4e2d03418a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:26:42Z), 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/USHM91856188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d4fea83df56e1039b53dd6741f9b2f9ca1bac9feecba61f0451d50c1d5ec7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:24Z), 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/USL4Q1830218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4339eded6fcde40eadbaf1fa8b184fbe0c7ab7472b5ea061c3d51d3ad893a717. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USL4Q1830219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c3c860f16efead525531e5e57013d85d7beea843a21475b34d4d50c2c0419b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:27:35Z), 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/USL4Q1830220.