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 0x1f5662a52378463834c946ac729f35b1d7c8e691f2258540eeb859221e97dfb5. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99c97086-5c50-48fb-8fce-ead0bf2a8dd5.json and https://artists.proofprofile.net/proofs/artist/99c97086-5c50-48fb-8fce-ead0bf2a8dd5.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 0x81992a741d04e119f8679b064c25d469eeeeac38ca002b9c300d29cf512170e1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX53U2389036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e699358585c1bb97f21dab409b6ed681092ee48f676b60244bd98df0d68fe. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GX53U2389037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9b51d3e7ea3f00f2586067eb426036d492277c87bd7da159c635c765564949. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GX53U2389039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f2a9867307856e2e768919eafe4df7cca9dc90251d9fe219c2b2f01e0aa800. 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/GBLFP2512006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90ca405360c29e395fa11ab791ced91177bc0cea909cb341452bfb09c2681d. 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/GBLFP2512010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dc5a9a0f5d2613ea688ec236b20742a60a7b76caad79ef1a36b0d0176b4561. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKXN22464785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd09d6997af1229994626487df4b1692cdbc00add2c551872a9727443478cae0. 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/UKXN22440323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e8b44cdc2a59f35d2566403c87b384d81f113be277a313c96513e29dd2f9e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX3Q92413089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67d75f001202e94acc647c920f5178e13a71caec8fed356d1f75b78e5b632f6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GX3Q92413090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1419bebb3f32ce73a57a9d8698cfcae34990a898070ee18f712e8c5e42ea9a. 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/GX3Q92413091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f735999fa9066529894222073d888eb80a32192a007fa5bbd6e51a678676d75. 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/GX3Q92413092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f89ee3846eafbe49d068abf8fc2a3ad1004c7f05b490dc722d1b6ecacad7199. 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/GX3Q92413093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b701f43c6f8d1df771c95ab4c3317c67c8e13b957ac3761be44f9a2b032d4. 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/GX3Q92413094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b865d7fe3dde1aa97d3a58005bd39e40e0b436814435f90fcda977c395f97. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GX3Q92413095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fad0eb98dbd35180309ba450b7d9cb104c19cac699e96067c714887a165723. 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/GX3Q92413096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65c00cd69869aa4e66ea8bb2774f9493e1c3981d4f3f7b8ec3e3d6904a7cf72. 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/GX3Q92413097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4639af7d8f394f66048c1951f7863db165c19adfec8bda396f0b15b4175b28. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3Q92413098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e30d64e607205d8c7aa6a77b7d98b790453193084310f915c85744e303e43f. 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/GBLFP2331362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695dbaaa19868fb585b4ade41b9ce3d47d773aa2aa5488e8902b9f4f272528dc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBLFP2331363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee35acf496897f65b5f01ce0fe61e70a28a9159816d97419b10e832631726bf3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GXF9Q2544519.