thumb|upright=1.2|Glacier of the Geikie Plateau in Greenland thumb|upright=1.2|The Taschachferner in the Ötztal Alps in Austria. The mountain to the left is the Wildspitze (3.768 m), second highest in
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 0x2d2abb09ecb61cab9d8ad2d65a446c372a44889c4ab031556bb2664221de8289. 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/2ce90957-0419-450d-a865-8bd2e37a1a10.json and https://artists.proofprofile.net/proofs/artist/2ce90957-0419-450d-a865-8bd2e37a1a10.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 0xeedb49206b14a91dd1b42851086a0bdc1e7e4521d0f01c0d4b979f1e13b73de7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USLZJ1523647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c15481b999907190f6de8a6198d672b4fe06a8fbc9deea5da8b319b8e252b19. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCACI1524312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614764cb7a0d543b1408dcc2a3eb41805ea3df778b403781e8da984fdcc2df49. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3GD2512783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cfc8cd9fbaef913d57d209082afc976e73809c24ff14f15d6c3d5a2ed87944. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM5LC2100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fa08c394248d979ef44c2ec17b81d67d8aa2c98fe5c5336cf139f69dce7aa9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB62273412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8ffb278e787ca4149c79bde6f3bf69d744a2c43efdab7cd2910ee71655dc4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHN42361736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13984b13748c31c836a52fbf0f77064279b3d8e3a70ff02b8a5c5ff84a953f16. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:57Z), 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/CA5KR2372976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e938ec0ed7dc6fd1e19cfe8b79f8dbadbb090739d73ed24ddfea72ccb360e5. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NLRD52258036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b650203a8ec8bef892104acf48252f472a75fe19db72bd90f42c274fa92c0d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:44Z), 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/NLRD52258039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9351a51f3cb1c265c2b723a9861fca7946ffd00601c576d178e220da69e408c8. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NLRD52258049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd554dc0d8449e0d847c2d578d66e302bbe8ac0d2c25d91909796f0dd00b324a8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL8RL2436385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98968aeab69b449d209fae03421e5675c4bf13cb4413ceb411be5425ae64c59c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NL8RL2436387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e54d79c76a97792b941cf9648d15d3b190e5a5d0ff8e0fec9ddf522f4db400. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL8RL2436388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742f0aa4da449a00110dd6614bfaabac322fcb82039ae0129149ee38bf0f9b8a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NL8RL2430906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3034dde6a5354e55129e8bddd1a3e27bbc34b8ef1bd52818900c05b1e03763. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL8RL2436389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5838a95425d6e894faa76f7969055a8919cb0dc15e7e6ba26104f6099777ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL8RL2436390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f50b3eb77fc23d8d3bf2f1d18015a81025c411f6c532e749165e3577059b2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL8RL2436391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771ba11dad707867f8fcdd82801543a976f306bacfcff7aa1f9cf1a1f23bc6a6. 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/QZHN82586516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6625153a5e83ebbef915b9faecd8ed82a885b8e5c32c01a0f70b1f55e477ee4d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:41Z), 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/QZVK62300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1a8a81d5e15b4da5d0e2504179ad41e5e325c4ef775aba29a61c987b559552. 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/SEUM71701083.