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 0xc7622c3b84aa82653513b3d872e7caa723ebe5040552a6fbdad0c6846b7bcf48. 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/31303e46-caf0-4f9e-b023-a5e84001c83b.json and https://artists.proofprofile.net/proofs/artist/31303e46-caf0-4f9e-b023-a5e84001c83b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
High Upon The Mountain High Upon The Hill
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 0xc22257c8c461b7bacf2ed26dd85d01ffb08c705740035f1f6841d52146c67f5d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BEN031600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af1b3f7ffaab2dd874bddfbefca46710f44165737e5c73ecb1f8688ac8fff72. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BEN031600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d1e0352e8dcd9ed74973e927f76d122914d3b8ada3288b0f8a469afc9b9e6e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BEN581900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6089adc64aee3c833943f3b6f2abf1e5424f667d4f644f61e54ca56a298609e5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BEN581900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821a6df853512aee4cf8b5d91cfd5c1d3378fb70ca1bda0e7dd9368febdb814. 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/BEN582100632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8156ebff283481ab114f656f8a77701a7680de836ab52e76e91cef9a4b15a44. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BEN582100634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad59d4ff28afa3bb2b89a7725bce03aa161daf135f31850d389eaec39ab79e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BEN582100635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ae4811b70175b033b4b425733137d131408736228b81732a2c46b52e63fad2. 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/BEN582100636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6109b619f75f65c6b861c8fe44aaf0dcc4d91aebf9f01481facdd72130f789. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BEN582400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46d0c334df8e2914a480389ec027f55a71120c799384b69c654242abe6c041a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/BEN582400717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b4dece75de50b4aa5182ed68692c7e95236a0411554c045cff25283ccc7779. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/BEN582400716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74cee79ed9d44630f118d86d6482b8756f94616d3375c307da7fee8fd2f040d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/BEN582400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf747dfd90fe27c8cb95641d0054093858bda561a2b355d97f7bacb6c42bf351. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BEN582400718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e73742a17bd606cf39cf38c7deca8790c10ef2790b12a09d18e859690f1c6f. 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/BEN582400719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacd6843b209ff22d0e9885906c39437b9c77c202dd1dae9ac6686ed41c518f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMGR32049518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af1b3f7ffaab2dd874bddfbefca46710f44165737e5c73ecb1f8688ac8fff72. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEN031600017.