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 0x58adc2ccc98d8260f802842f2e06fdb23bd8c6be94435a52449fa0c1821c9e17. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/606f4456-482b-46dd-8e6e-e83ea56e1d87.json and https://artists.proofprofile.net/proofs/artist/606f4456-482b-46dd-8e6e-e83ea56e1d87.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 0x2d01abc648de9328f6722ee3e5d92eae10adc15d31a22ba312a064377fa26f9b. 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/UKXAS2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d04107f6e6e8c9188243fbd511eaafca1b0342f0485779235645911be014c64. 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/ITN1Q2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cb84ebeaad3bb37b043ddbf11c377bb101d4c53754771b21ec5a8cea6fec77. 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/ITN1Q2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe311a8da2501c5b79c5fc961e95366d3c1604567fd12470958a0a59b15d99421. 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/NLM971900568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353d2897019948e2a25eafa5316ddf7b9cb58822698a75a61ca6b7192b48164. 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/NLM971900569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0437c4c57456793d80971661b565bb38be59906275af866906556c3c65622861. 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/ITA642200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fa675d4a4db428bdacf54b256013687a66da0c0a0cf2691e0db28cd661276c. 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/NLUL62100043.
Tu Sei Pazza - Whodamanny Reinterpretation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3038655e892119baf2ec3f2003f2c329de965d8454bfbfe50d9124831f924e9. 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/NLUL62100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e8e8366ff3bc247fa4ef2e554086a296ff783108d8ef959f154b1f597be52. 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/ITAF21000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d20ed0b6b576947a62b87b92ee0e79ac6981789efda51c0f8b7258217dda062. 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/CH6542183552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d556a3efc52bfdbed4a19532a7a6470d8dfbb162706e3a72e9ec1d4e699f90. 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/CH6542183523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f62051cba576cf767c3b216ab17d1af523969cc14f3e8e5ba59b4b048dba0e7. 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/FR9W12108814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4f7650f810839cd5c202cc8b2e79c9a170bc4836e6a6881e6e4b46b7c7b108. 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/DEBY41200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f05607d09bd8e161019a4fb397fe0e3258f3848064c335c68effe42fe4fa45. 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/DEBY41200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41205f3580b373dc2723598ed8783804f2561066681325a4ed26348440b9433c. 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/DEBY41200833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacec860c669d1c9a3f8b275ae2d9eccadf8deb22cb0fe202ed7008b4c4add4f9. 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/DEBY41200839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd907f0e7f20424e244752e77d265d09762d6f668bd8d756518b39de8f0f1da51. 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/DEBY41200823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe06effcb39a3c59fd0418d54b11b34ae8d91cbbe00f567a0f2c5d1b381aeb6. 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/DEBY41200835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c01843a1047a2882e73a4c81a101093d5c6734d6a6ce4f2d9decf61913824. 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/DEBY41200836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa918110c64bda15cf026c019278d28a53b3f3e8201a5e3f3ae0788460fc8cc82. 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/DEBY41200829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ecfec03bd836329ee8d0580298c0016d001276db71fee72aba50cfc3822d2c. 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/DEBY41200837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fafa293152d4ef120ccfbebd98a790d959d6e9511289ca7d81dcf93a6c894c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:25Z), 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/DEBY41200838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5148e4ac0698d8eb6812a714fa694ef246001f5eb11c57b008a5f4bd06289e. 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/DEBY41200843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc04884588d46695c32ea52b08774dc76e6cc6d6f22bfb195afd953dddda1f1f. 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/NLM971900738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c0a34931e3687756c46a0877709efc0faf1b4c41606b81d3d5bb6d6552d10. 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/DEKB72044585.