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 0xd59bfdc222e720cbe0f79b9f113554ea699634fd92a84790d6149704f4ae5ced. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d04bb5f-ecfb-472c-a3f2-296ee9df87ab.json and https://artists.proofprofile.net/proofs/artist/5d04bb5f-ecfb-472c-a3f2-296ee9df87ab.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 0x38162695b22b26943c521ed040024aba52364961f60c9c155336a5729438eeb6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAEQ2037261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9ae4dbf86583e19e720821a5913c78cf5172a9f6fd29b48138c6cd8b9832d1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAEQ2037232.
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 0xbedb3921a80f8c1eedc21af9a7a2346d20f6922375a0cc446e39959c709df5cd. 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/USGER0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576e4da36578e284f9347dcd3fcd59263060a2f6498e2dcbfed14b9d06536519. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USGER0600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac0057ee893927f4c8442f2a98b9876086dc56f1ba843a185a6032e59d4566. 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/USGER0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eeaf6f105a2c69cd221e4042a34109e2c7bff4176a069f96ae6143924ace8b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USGER0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0419d809e0ef6c1a2a27ab6e46200d141e3511cfa98d957f1abc04fc56f58201. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USGER0600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a0d06ca6932cb0bbaf5aa3b60c5b7b67654bf278dabbc0778abc9d1b215568. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USGER0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0482c1252ee5a03231769c9ab5e58aed1073f8f0b14331a8f5d0132da3ff3d8c. 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/USASN0543202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2687c3219e0dd87cbd01783c507f82c491f81f2c1a29d35112e89ba67c81aa8. 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/USASN0543204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860ebaf5d5b6607f3d9b4c369627ffe4107b48158512575350dcb060e1b149f. 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/USASN0543209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6df8548f0035f66c43ce0d1417a983dc1f62214183d7ec67ab4e33d3b215027. 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/USASN0543211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef0dba31ba0e1695d8b52185cd844f1139112e7f8adf72481277a2e7e292507. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USASN0543201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a91500452c679c19e468ebbf9547b603f2acab6313811f2bffba8432819cd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USASN0543203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee9b03844a297ba3eb7b4bbfb588a0ff604285e5051ad26af4b77f86e03590c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USASN0543206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd004b170ee5d219075816fb15c8fb504b2d5ed1530230b8d8f265453c5ae8441. 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/TCAIY2491152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ffb8be303ad4484e03ae8357ec4f6dc2dc38b00e140cd3071b706868c4876f. 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/TCAIX2491176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60929d4bbe7a5f91a1c95f2f9683beb8b38d7d578225d1b63a0cb4e080ebd3c. 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/TCAIX2491115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5aca293a0a6c69866574dd981ef3591149416a0a64baa1470443340c6e0edf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAIX2491138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef3636346cc9d8197087abe1e2a47f95775478e1301c583826376962dbf7937. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAIX2491247.