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 0xff23c1a35f175e582c710aa6e685930b86262bec82a20565d2c9efea832a47b5. 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/2d81b87f-d6e7-4bd0-a3ed-8b866e9590ac.json and https://artists.proofprofile.net/proofs/artist/2d81b87f-d6e7-4bd0-a3ed-8b866e9590ac.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 0x73465a6d59740e79e450990c5ba21396280bce30b0db9b7eaf3761cf81d390c4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZ682301905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4011c12337d86950547c536342e451dc5224a056f99f5f34fc16d57a494ff809. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITZ682301906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c30d22f5d61bb5f6ef3a3d18270eb58bb42b0006065c88bcfda955e69719ca0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITZ682301901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e02dacc37fb1ce5bbd41ae75f334cd250a9a55070310ebdb7777f422fcec31b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITZ682301902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5e298a0157195abce5932c4b4b3adbbb7c9bfea6b99e933b469c2334177ccf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITZ682301903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d0cba8e028b99f395cab7b68af3e9846cb68eaa651bf40046f1b41c0a0b6d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITZ682301904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d8585a4f57afc919c655805e059539c9bd5719db3763f70b322c6f49d8069. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITZ682301908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bd5fec3e25f6a9ba9b470d3e955ecc4b1910967251e62c1af196fb637e66cd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITZ682301909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14805fa2cce45450461195e6015345749098a9a1484fd938d87837ef0691609f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITZ682200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd059a4bcf7a968a3c5471c47b409db401459a405eb59245f294b162f3b4dd9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITZ682200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3f3d9a1577ad3f124e93691352dac3939b986c39dfe2cfa2c77c438d707102. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITZ682200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89b9406a68ed66ea16a821deae144a566e53625ba989af6426194128c6632c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZ682200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d8f51eca32372bfacca4cc3f75815dd8492e6e09582f6327ff34a90e155f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITZ682200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837972a52e14f51c4bebadecff76c563b5adb5f14db93cc75d5a81a5a748c83e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITZ682200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c7421e463ef023dc5f07f54de78bad4a8f7be40cd0a4d21b7c4dc7b86b127. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITZ682200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c52a9f9bc8234df0f09af0d8e2a2d9f51ec90e56df08618219ac90998cd4e3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITZ682200708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b6749ed30f5c10738ed4dee338a346a79eb50c6130207bc45080210cd5855e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZ682200709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1408bda0522544dac26317e36a8b0f278614b82a9e9bb35dfe28dd669c1d2d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITZ682200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fc91899d56ff058838fde47635e420ff8fc50f5a1999352583000fc7d66b01. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITZ682200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb8f57b3ff1d9f94dd0cfedfff7c98e9b6b98dc3a71320022a518b852f947e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ITZ682200712.