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 0x6ebf0767c897c6b3ec026e4b63a80ec708472bcbaf8ac450699e959aa8311121. 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/f871ee81-f86d-46ea-863e-d3d065fca2cc.json and https://artists.proofprofile.net/proofs/artist/f871ee81-f86d-46ea-863e-d3d065fca2cc.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 0x0b3f9c7b149e52ff73bb308d9f8cbb96d27428b7fdf83d767aac455245a67154. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR96X1693404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30bba28f3b00a0fab95a47ddc01b7abac90489a25ad2034e7608ed6144756b2. 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/FRX201744339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5bbc887f6e9d824bb3641c055d94f6bf248f3201b34037d1fa1cb0f54e12a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CA5KR1927872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9698e1d06f0d52ddc3384d40256fa557ae1b402e58434808ba969955f4d87bdf. 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/CA5KR1948770.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d674b3b4cff0bc32a3b58f903c29ea8ac825dfc6f040205ca26c55f72b71975. 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/CA5KR2011175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba173af8118051f50b7a6d0ea0dda7b5a292304b73b80bee35696a431b10f9. 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/CA5KR2011176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe9f3f48a1860f4e1eaad36ed2e89b06b27306cc7adae610d660c00b2c5921. 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/CA5KR2011182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2031c7d03cc3a856df28234e0f0ce1987524592c9cc0bcb5ad2a0a9d5bf71a2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CA5KR2011177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c0e4332130cff954bfd5c3e22f07f5038b0797c4b06dbf07f67f653f22503a. 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/CA5KR2011180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e270dac89c131b4963aca945b84a69d5ccabcea5dcc63e764aa2c33175c690d. 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/CA5KR2011181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c63cc7b541b5870cbe9eb093d0db1ba314f7d3f5969343ae96b20291bd041c. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CA5KR2011178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc221aa072d62d3f90936063ad78949f51bd03c61bc2281e11537cac9a7814f5. 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/CA5KR2011179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c936e6b6618fae5897b3e1bf9f3417d528f9f2c32d03d0ea753e9db96691d2f. 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/CA5KR2057534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520c08c9c7ee0752cb393ffdc0de5b2d054676a8bcc97c76cf1b452806d92d05. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZK6K2093407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339a9b269683baf575c9f5de80cee501a4701b24ff915c3e0cf5231af70f54ac. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CA5KR2092940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0cbaa0de9512839dc34038bcb51f7d5c0dddcdd7c90b644e304dd745011f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2144855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ac6a3311f8a31d4d019c4e57a745f0f1776ad59a36a4e9cead375623e0e55. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR2388516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e78a3448fa7fcd434c266e94ad75f5523099ea98055c550219a831f3bbcdcde. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR2388517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55bdd3302c31d0d89425dbd9b8818f2c0222492ad007eb8875015000137e02. 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/CA5KR2382700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e47688d8aa7ffe109227981103f80d4dcc122aba13ebf767d369d4321a7d031. 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/CA5KR2388518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa8e7353449fd61957f98c9d8745f819daa9797828da6317c90bc7793efe37. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/CA5KR2388519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a5a46a407edbb18ad91f3a850fb4056d56addbebb21691f2d6a48946d1832. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CA5KR2387797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3250f73468e08b5435cbb9269264e7a3d199ad9acd408c3ad9352ff2d17c35. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CA5KR2388520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457f4c42bdfd97dc9b061866e945972c1af1e077c1236a855bb8a7be66ac3ca9. 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/CA5KR2384951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb37d6b9fe6a3b8910acea8abaf9a2f7d59adab16270e0dc2e5b05599c824fe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR2388521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d2821b9002d18c94958b43dc20ee82432fc57ac5ed6e56e8e67a8e3cd3f070. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CA5KR2388522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de080e58e2f9dcfcc969ccb7a2c4ad363942f1568d25fa70c6e1d548aec65f2. 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/CA5KR2388523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6735a009a7b8364b7cf2b2e8f622090f7f49054c3b28e2e0c060ec70cb982887. 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/CA5KR2388524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa76b2b8fb7eebfcfa583655d1f2081b47bf7a4ea6cf2f4b95e4f240171610f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA5KR2388525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358fc36d824d3b0f251bcee491e086737e328120924d087cdfd0776fb1b53b91. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CA5KR2388526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69696489537193aa3a414486eef6632244e6e79f130483f71452077fe786020b. 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/CA5KR1956591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffcbaabf648ead1353ff3e3e4dcc8aa6d8cb0505fddeb20d01cec735d6f6d61. 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/CA5KR1822146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f4480f7778477ac82ab5f7b2abb4ac8b41309b4b2bc94648f1ce6483eb0322. 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/QM24S1845432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47741baf840c58396137b093fc431cb49153354e4c5cd1db7bfd698fecc4dcd. 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/GB8KE1556865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094c668ee2174f2eae96fa9e2d53395100504c6a9938fb30851d769d923d57ad. 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/GB8KE1557929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a08523bd81e726d8cf4dcf66b09f3f2ef4db097ad7bd675cd8ac791b6379fe. 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/CA5KR2191433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5b83f736b551120e8f865e00178741c9d1208fa0f96e6a357bee9f69797cf7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GB7YL1814007.