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 0xb6ad35ec9d280d198a4c75832462246e8b59ccf58c7e6698b493d8b17140a310. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad96f192-c457-48ec-ac2d-ccb0e51e33ee.json and https://artists.proofprofile.net/proofs/artist/ad96f192-c457-48ec-ac2d-ccb0e51e33ee.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 0x747d6b9453c34f81c64cd69677abd8d519560bab3fa1f5a0486cefeb291ee26f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BXIED2300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5ccbca95eb4503ea87336590afe38603b4a422e591473f062eeb914782012. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLML62300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb31028862e341988ea3545466a6d1f50186cecab136f8ed68953611a6fd2d. 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/GBKQU2404669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0263f628d41aa9242756546f7bafc5b3c950303387a0541ae8cfb6453258ffa2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USUYG1544651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c95b06e5f231b41027b8f1715d82c5202131267b0f81110e557e5f39a4fce5. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/GBK6Y2451334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffcd4140139a10eff5dc3cc87d5e8ee2d5fda860c9428b327bee0e5e41aadc8. 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/GBKQU2503849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e06cb050d01d16737b5913b9c076082dd438abab10f8a8f213eca55d2376c43. 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/GBKQU2503850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a060513533db64157b97cedbb598cd02fe0a0ee1be3bbc5aed5c8a2e2e72a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2503851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a796d68a88e66f818d8a693573c1279e53f61aa4add32f283dabfadeab5399. 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/GBKQU2503852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340052f853207dce619e70d8b552fa98535ba3876b7f9457e2abd5bf9590b10b. 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/GBKQU2503853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e7ff32eaf6ec0d99e5f9587e7eb2c6110e663fbfc5be769abe53cc78c3a024. 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/GBKQU2503854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a66a97b1d51bf2f4aa185b71274e417d798a789b073d9726c044316af62187. 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/GBKQU2503855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245f836b93b7de6d919eaf7f0c405f0c197bdd2b9f210b335b07fa4e7b0296aa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEBE72500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd322b9776ea145c3842420c3ec32e794aa0ffd0ee242f8f6c01b67984f127460. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBK6Y2551392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c45b7227270cc33fe28a6153e669c62d02f5657ebd1cba9c787019593ed21be. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBK6Y2551393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99c2d7b66b7f7c17c4803ed83c8b6027c0dd1a1df1e53b379d3133ea8cce092. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BX0BA2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae8f0e4797d752cf3eeab9a5d99d1e660c094ade114bd9ab4f3a665df369a1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:36:33Z), 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/BX0BA2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cffdf55bdd68af4807c67c92e47d8ae0d2d7933f6baab60bcfc03b1b61414. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:10:23Z), 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/BXG9S2500879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fff0844731f6a9747f06963daefd2540e54a90f143d299ef3711ee11a67932. 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/GBKQU2591977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a060513533db64157b97cedbb598cd02fe0a0ee1be3bbc5aed5c8a2e2e72a. 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/GBKQU2503851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1942d25a3dad9b344760c5b1a22abe042a9acedc14ac982687ca2d8fb6b41e7d. 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/GBKQU2452166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1942d25a3dad9b344760c5b1a22abe042a9acedc14ac982687ca2d8fb6b41e7d. 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/GBKQU2452166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55aafb4eafd1aa6fe920f168dce68f018dee69f847be22d9b9b4d8dfd737cb. 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/GBKQU2436792.
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 0x52fb8477468c08eeae845109d3453938db20b2bdc2bca8c095d93eed71ac4816. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BC62N2300130.