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 0x021f57b7182bbb7a526099bbad3264cdccaded149f861cf616ef2e6d5453134c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a07cbc20-26d6-4327-bc6a-4c5765879b42.json and https://artists.proofprofile.net/proofs/artist/a07cbc20-26d6-4327-bc6a-4c5765879b42.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 0xca4b7e4aecbe8a6b4df9cdb4af56ea16f1f2097b8ee9c805cac2889c5d7491b2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ESA122428486.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e03565bd930a1c590926e756e7364af14505dce7d9f62d6a5efc732f81e1e7f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GXC5E2413722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8451b865960e8ba01231feedeb636c6100c1eb1dca85452fbf92c4b33b6700. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GXC5E2413723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa957aa144a4b96ef8edd78a9b9125a87044700bdfabbd7669980eeebcb87100. 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/GXC5E2413724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc91660a20417dcd192dbc4fe3a2b4847f8ff5600d87ca8c79d0f0f4d08476b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GXC5E2413725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274b1094b9f32df19d7649e3fee21befbcd1e3a3d27794d68f416340c3185ea. 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/GXC5E2413726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9012dbaa15dc700f3d4b3c687e1eea814d68b00860974d8c3906dacce5d77878. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/PLS922332912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0b161adb404d2805f08e03ffcf25b9bbfa4433ee5f622c28e9254a034bc0ea. 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/PLS922332913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780fc63bd49899e1bdff25d6a3523d289c4f6d01e7e6982d6fcd7210955b91f. 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/PLS922332920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0cbd44dee3fc9a862c82b1522f019a6a1b8622b7f099bacb0fa3a1001973e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLGM12332878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3773f5bbc357e4195681b1e85693afae48700361fa5f2a3b0913092d26651. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLGM12332883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326b711d1a3d0d0700eab2e0be8ff3ee8c8bffb10ebdb8fc5899142db215c50. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLGM12332996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a9c572d9656b515478c83252a4120700be714397f029391f3c7f33de6da4b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLGM12213878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357ecb78ce4d2d436c6a1771172add4f4d3ef7573d32a2a8b1f3b43030d1d7af. 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/NLGM12213879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e341f7e6e6beb262fa980af5fbe13a937d90a060f50a9e78290aeb1d6147c0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLGM12213880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee7381bbd88818bb5be486d28dace5b4d0aaaf5afc2c1815fd8bef4f63b416. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLGM12213883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b27675b4a567ff0c2cf634497e5a6113548fda8ef36ff2ac76b0f2a25300e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLGM12213871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420a56fd544f4dc0516199c6f03c9d5478415b36f32c89fcb4d3d89048dce3ab. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLGM12213937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f4f180804ac044317c4694fc0738b9d21f6357f0e947775ed9ac1ce34fed04. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLGM12213938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19bd73aeada44b672c9eaf83cd6884056e2015d3cbbded60face0d8f373fde5. 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/NLGM12213939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384781c65d554345074359d56f072a884055a47697389594ac565719159b341a. 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/NLGM12213940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8a799dd8f5ca3782ff3724cf3c5f1f3d44a1081c74b8e5ef0a245f0e1cdf59. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLGM12213941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fe3d934e58c65b7163da01a1a51668701d59d8bd4f352db12b1a1259eaea39. 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/NLGM12213942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54e99da24461f2f2c37867eb12bfdc33263845971bbe18a1e5eab24dd261801. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLGM12213943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6471a60dc132b2eabd672a6c58a0630c412d26e9eadf870ebd22ecea116f4c. 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/NLGM12213944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f6d1f80936e17c83872ba53fadc468267bd36bf47c3832522cc7a8d6a51f7c. 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/NLGM12213945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86afcb6808d856ac08969b0200abdd2ea0b75c910fc89564ce6c3bf2795227f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NLGM12213946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d1cd29d6aa4c56e04c13c770739e268567d1ecce49e418c031333a6844940f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLGM12213947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aaa3e2c6dcd519765d9d68346c0df6dbd6ae482d422fb75852da64c0edb616. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLGM12213948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a45986bfdadb2d1215f58d2e668e2fa46d50fcc8594af02bd85196a866555. 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/NLGM12213859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742381c184d7a13836d50df879f930a8410e1a34bb29b3c8e436b7b43e6f3517. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLGM12213847.