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 0x167bfa50875b230a85514bf9035b585ef3787b8be7e6a122922cda172663c4da. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2469169d-088a-45c1-b474-6a51d0daa083.json and https://artists.proofprofile.net/proofs/artist/2469169d-088a-45c1-b474-6a51d0daa083.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 0xed959624d2315aeff6714f2cacb55395d802d4c80dee0fc406f4c831cde3db9a. 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/FR9W12301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccfdfb4374b4ce580e87de64a53befcb196b9ab20bd69ed4256622f555a17a3. 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/FR9W12237860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6de5c743f12bc41867b281c643804981fc2bf9128f7d5cd6f9ac314b29596a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W12301621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc612a49cf9d2b5be7ad440212fd651ee67f9446ae67699186de0146435d704f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12301622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd39d9be601c90bb371fd2a00e8fb8819f1db9014f6d6fbda5bdf7bcea355fe2. 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/FR9W12301623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb486de80b770ab53950adb146e7a8e6c7e7cb2197c08e3dff5fe398e22022bd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6c1a774be14a4ffa7092630af80627ac31a9c5cbb5d74ae4e91d7dbb4bed1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12301625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea11b55bbfc0d769c9ed99c1dd0e5d75ba4a56f584780fea05fdf77a39ac8f1. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR9W12301626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c9307ecc031e42d599cfb75fec590ee8a9ae2ff12385a180964988f0c76488. 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/FR9W12301627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d34ecb6e1952436d4fec36adbca5f7a8babfc7fb95c2227d1b104c197ded5f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12301628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50118cb7c0ed4ae9b422e18898e2d4cf993ff21805405a47c151d456a94ec62c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12301629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad690977db463f4719ea11292dbe881b7a7236ae69020a8eb8c655e8511e598. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR9W12301630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad61dc68364e3d0e2e3892f4f09fea09f35a1a483d4faac5d538222c983337. 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/FR9W12301631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc44ddb45de68dd198380cf2e89721c945b5b5b9b9ea74d0c5a4548c6e470169. 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/FR9W12301632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ebf0d60dfb6aa5aef5e5be5aaf25a635cc50ff22bd2143f3d918186c7450a2. 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/FR9W12301633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d0789534b4d4cd85619492002b27d48274c0115734c0cf9b2785da420c2d0e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR9W12301634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c8fd7bd3ddef310abf127fa25ab372594b81c7cd12aa69df17725dd212d4e6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR9W12301635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a11d8b8f5cad8b3783611e71796d02eca2f1818cb9ee1a2468ed909a975d18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11826928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0180f2e666952cecaf0c82798bef3b6c1a41b2e53d268dcb876b56e4dff9adb2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR9W11826931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c89539dd3e80966be5ef659e1329f526f532a0f463c944fc7c5e17bbc5f458. 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/FR9W11826935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870eb958b65a9ce589b25114b4e6c2d983f71ed9ce73910f3a3612f045300597. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9W11826937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971fe5b53e41056f7d10d894b634d798acca37ea5f6cc38ea4369263a37486b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11826938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe251b071327cb39be68ce5e49ef1eb982c58279b15dac7a6941f2f8fd0b97df9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W11200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d783fe165e6bb9e27dc327e6646f7cde0059d03322b055db80f1a93588317b2. 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/FR9W11317225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981e575db78ab2a7eba60c410792076f0d6fbb5ea703ac2eda1dd0cbe3eb53d7. 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/FR9W11317226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe251b071327cb39be68ce5e49ef1eb982c58279b15dac7a6941f2f8fd0b97df9. 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/FR9W11200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e32dc1ae437fc5c58488f4837d274d9348164de7b02c3efc053d61e343b46e. 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/FR9W11200694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7345fcd0340f6f178d61d978ab88db6a0aebf01de2afaf81758c22b93bea323. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W11200693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03e01005f8209ab74d84ac62df306605ce9bde602d2986ab2d0c549ef0111c. 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/FR9W11200697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b1c062f35d756315f83c127d4da07477c54ab2a75c94ba198ff1f82794cf8. 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/FR9W11200688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b3995b3d85200ea93bb3bce85970a3bc714f8582693bb6a4d0a849742479d9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR9W11200695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c89539dd3e80966be5ef659e1329f526f532a0f463c944fc7c5e17bbc5f458. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/FR9W11826935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef6c9024faf1bb8760a14000799adfdb5e80496e109a2dbac64980c3005500. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W11522241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf3937cd48be9b1dc602890b8d04a32cb40d24d60ae5a7ec83f77ed29a3cf17. 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/FR6V81173733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd762693be18f2c5d2b69e097f40dbd0c066f525f37fe36322d67957cfc38e47c. 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/FR6V81173734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285a5c8831bea91c94acc70e25f928bc32d187a7dbc9fd474e8d48d9673b8585. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR6V81173735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af216f02e68336624a58737a70c4b624e1302f4b7790833a6713c0ee5de02c8. 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/FR6V81173736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584edf9e3e39cb01c657a14a546c95d994ec0138b2d3af4054721d6b0113b7a5. 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/FR6V81173737.