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 0xf37e8808e4e40d754e784daeb3e2c5ffd5468e2dc233e745b214dd3987ff4e70. 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/9ee8c540-05ef-4309-a3f1-ee6ab0324d37.json and https://artists.proofprofile.net/proofs/artist/9ee8c540-05ef-4309-a3f1-ee6ab0324d37.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 0xc3e6608feef4c8ae755f48c59ae3d8c970b62f99ec8d0cdbe4e61ab6244f3889. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/CH7812100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494728f0033a2b6613515213f49bd260db0344675cf6bc1ac04af6440379231d. 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/CH7812221768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8896e0fe876507ec45e7f1815489da7de6bcb222ac794f65e59afb0cf093e1. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/CH7812224892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667340a5581208040a4205bc7a13ad7bc7485c73a143ef1f257a7df1c3bfb873. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812222929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8896e0fe876507ec45e7f1815489da7de6bcb222ac794f65e59afb0cf093e1. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/CH7812224892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35ebc9e9dd9a265e14a282c335c9bcbc4edce56efe2db8d0fb20e5723ed38d1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CH7812233032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f806bb3c61bf249afdf9068ba6e9bc6101d75350e0e7ddb5b20ce9dd0b4af40. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CH7812233035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746300bd70f273c2c538197da392b1e17773157c4221e2d58bb9324e379b1ec6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/CH7812233036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbd19810db7655cc4405338f24f3b45f8f9b5318f580c048f7de98ca51fcd4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USZXT2352396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10845cdc74180ebbfccc4816a59993cc549ca8dd6f0e8d73b839a3d208bab27. 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/CH7812403158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c9f34c119bbca366679d8487cb184a2a6c901ebef8ddfca92fc86f4e96ecc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812410684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e09b8884e759f1fd0a6f2f3967938bbe82f801e2f43e731da626c65c61adcc8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH7812412788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5896c8b5aea8ce1d3d9a62019a86e01c2e3ca3484a1ff4783ab7fc62ec199a54. 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/CH7812412789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f19a6a9107068b39f662a9df26990f24c85b242fe41a87c21f12b4a74e4c877. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812412790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9484b406294825749e41124a0927fd02cd9682966e1a9daa6736eafe5fa367. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CH7812412791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340fdbbceba329ea067e808d49dc770562ba035b209cf88290018b0f2fd8fd02. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CH7812539996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c231c0664bf473dc1f187b04b1c03bed90f70a6511e8b0850d4220378823659. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH7812221577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c231c0664bf473dc1f187b04b1c03bed90f70a6511e8b0850d4220378823659. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7812221577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0c28441c76e21444e2abbcc4b5e092c0fde021911e3d3895152a13f63ff96. 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/DEKF22401217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287cdff3e1c1adf5fa329e59cf579621a79f2dcb213908c31918e4d697b51636. 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/CH7812217393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7040e2badabcbcabb1e6bd81a3fcee673f3886822781b594f48a23661103e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022111281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba7d404c566587e8ea5a38ffdc32979a1045f8353587af613b07da9465870a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEXK52100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200f60d8e84bc8d0f63cdea6f04161324901fbe22f6bac27abc4eebbdf8141e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEXK52500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d378bd569b95b2a241bba5b51834994186012630af22eebc3ea28c1ca0bae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEXK52500537.