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 0x2a13384ab354f5f28fd97853d49c4fb26d32db3258a2372c5801d5fba130b243. 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/672285b5-63ae-4884-aa50-dc6c438eecc1.json and https://artists.proofprofile.net/proofs/artist/672285b5-63ae-4884-aa50-dc6c438eecc1.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 0x59ccce93a5d8f6c418d7c0825a53e2ef34717029e5e52ca2de88bc9db8c7da6a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR2X42159263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e960ddcda432053102184a0053adfff170daa7d287619040dc0fe57f16d45a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7192200792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6482ed3914703578ee968cd74a671b8a1ee497bb3d32f3e5fde545cc8903b6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/IL7192200793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d2c02527235bb81ae270314c3df304cae9c50bf8519af23e0fb21b2c929aa. 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/IL7192200670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147edcd3a0af04699a030de7ecaddcb2ad997426bca41bd2393b1bc89d34f935. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IL7192200796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc8bea6a62eceba5fce9a4bae970671bc9531950d6f7c6acb89a4bfdd5baa0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR96X1946166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380edd2f5f44a4d366643540db3fb7e52f5ebcbb113a848ac0e7c39e876579fb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/IL7192200797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf205904bd3263ef5c8e0ef194a581f07b5cffeb298536713ae59636b885c5aba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7192200799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eccca31a0eb7fc2050bf57478f82b8044a0729c18fb4f4488acea2d6fea8e87. 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/FR96X1788226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f50848b55b75a8a6ddd42cd0cb86727a5b519ba05c02a855467ea7e3d8afc9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7192200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ad434159e84894f5959cf413ffed1d382f5c641000db82ba34da3afd220d1d. 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/FR59R1971300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe947f91f67d008202bcefcde97fd6e6265353dfe5142f0f55e332dd2c382b145. 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/FR59R1971301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eae9bbc0bbf5175c04ce9259c194b3d37c1861b02a525121a1f88371240bc6. 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/FR59R1971302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd67ea309cbe77061a0fe3ec1e2f3611bb35da2d71e45a39465155e4f7d6e7d. 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/FR59R1971303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9f629403aa1abd8965e2e73ebcba0e08d03670040b08d0dd77ba47f2e515a4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR59R1971304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d73e41ff579f1ca00be9f68e7fdd3d7a4aac8c016ca7d38b230910a5bf8f44d. 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/FR59R1971305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8681232aee053680052a45e60944ee7fabad371a8b4d96616efde0a3b21757. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR59R1971306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a987707f1f487c78ce249ef6e8899cb50238446403618e671a303c058ee0850. 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/FR59R1971307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b483b8ecb9e94a59ee06f663be7b9813d5f6f39b96ef3eb1cf53786355691c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR59R1971308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbd60159588e7d0f6624f30cfeb2e435ec86ae63bc23e1b08e3ebdace9a4c50. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR59R1971309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ceb22c374bcaf76b5263e0582cf994395ea0d2c93d51614cab46a904bc0165. 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/FR59R1971310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b367aa9157cc9f995e933009acc9fcec982d7daa4e51b7e5f2d97f232b72a7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR59R1903797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab18ba4bbd0522875c0f2ddc91460d76aaeb7d8652ced355e9244ca9adb3e2de. 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/FR59R1903798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5635069d0849d506445cf83476e6f51e7a13566f1aba92776f24b24f56de0520. 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/FR59R1903799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e51468369a590bbf97322fb55fdb831ce0618ec3e190135bbb772c3d8e79e35. 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/FR59R1903800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f75c0e679968c3ec85efd0fed48b0dab2ce49834e027e19997d7894f650bdff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R1903801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b82e110f63d0ab32d891dd202031669517112a8ba71deba0180478d9c68a22a. 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/FR59R1903802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f2c63f53a7fa8f4ff58617a0fe33ef2c8ea867465da2d7fc0664eafc86d9bc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR59R1903803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3bd43984155c607afd14560a1c66064d17613f4e52483dedc6e43cf40e40ce. 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/FR59R1903804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ba70fad945b8a69af9e5ef3be781da983f4227a4ecadfd92e52e99df37c171. 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/FR59R1903805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1232b9318abcf9294684480c8fc96fc9caab40d5633164f10388a8634b7ece9a. 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/FR59R1903806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc73aab118379af2293e82667d06aa67edd5acad3474b860651c77084d8db33. 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/FR59R1903807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852298b8f3406625bb8072b582390d741849275aa14467f6f85d9b4b0fae450a. 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/FR59R1903808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f003d8ece589fc737e07a2a22f357e70a8b61afa1663fd2d96d932eb0f690a. 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/FR59R1903809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d811dd154276110f1d8b48d5b66db584489b36040aba611d41de18a360a47c5. 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/IL6192001048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc8bea6a62eceba5fce9a4bae970671bc9531950d6f7c6acb89a4bfdd5baa0. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FR96X1946166.