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 0x5b55beaf6170e26f6ab87016c61d153ec8343690c2b16da9da6c36ad9e3e3886. 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/f7c03789-6fa7-4f1d-8fe1-1fe492da888f.json and https://artists.proofprofile.net/proofs/artist/f7c03789-6fa7-4f1d-8fe1-1fe492da888f.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 0x3961890673cadef8a0d78cb4ec104306002df6cfeda02f41f03ddee0f6613018. 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/FR10S1696077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200c87f96149dbbe456a40dba5f9de3ee1ed7e194085c2062f83798284ecf3fa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S1696078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1b48e0b0e3e80978623cc68a9b194c4edbf78a3de32b07d57a544133b2a61. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FR10S1696081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff53201054ae99ced08cb4e9300e0cab561ffee18db219f3565296c55c7e64b. 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/FR10S1696082.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc322d2f4b6ffa045a71e3ebde21ba073413b9e486934315d574f66993bd775d1. 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/FR10S1696083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513a94c6f4de1c461d42990d5dc8bd2ff2cf64eb978084bce9262a41f2111ac4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/THWTD1810075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d74e9333c4b67b77cb447b30f5e3dfea1a8ed0a59dca371788f4b8321ff67. 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/THWTD1810076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeab0740c2b4f596de4dacdb574a75c91af800c90f87ed140ec0bfbcff675a4. 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/THWTD1810077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37111ef3b66815c2ee59072ae70d36276a005df711807bf5359422bcfc1b2a. 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/THWTD2011200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c447e04feb6cadb6e422e9e1b9cc9ea8089a22bc11dca3b8cd684040e8bc4e6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/THWTD1923900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c447e04feb6cadb6e422e9e1b9cc9ea8089a22bc11dca3b8cd684040e8bc4e6. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/THWTD1923900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37111ef3b66815c2ee59072ae70d36276a005df711807bf5359422bcfc1b2a. 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/THWTD2011200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9ca08bf70e32323f5bfe780c982f37936647b102ca17d591c96a1ada4e52cf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/THWTD2219500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f409238ba1279561ba0996b4cfac6690fd8c1ef1a11f656138da2ccf40f6f8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/THWTD2315100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08a547d361593b8302910905e9ea5d5ffee725449c81a21dc7a416ebc88a629. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/THWTD2315200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c504171c82433ae40bfbbe338b5cf8d6b01ad8f38eda3d49af272047842f07. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/THWTD2315700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1949f0a3502852800e298d4e37e6684c10b347f7e963757dfc51dce55b5bd52. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/THWTD2316100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95058bc3375fc0965572e711b56932a11f2eccd5f48845602ed30b7aa0eb18a1. 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/JPV752105099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781bde196a55b2373c60418934f53a71a94c09597ac932b2510d5d913caddcf6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPV751901284.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9998d751e75fd014896b5320d51fb667e9eba86d74dc86331b65da15938f82b9. 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/JPPO02203866.