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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e6964f56b4a3d9b9b77388fb9961109d29d463584179a099e8bf4900e64aff. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb45f355-1e4c-40bd-9e34-5630938495b0.json and https://artists.proofprofile.net/proofs/artist/eb45f355-1e4c-40bd-9e34-5630938495b0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf2c829dc5b8939d083e668b5552909d0f62d655edc64e3abd0880491e7c5b0. 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/FR9W12320270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae513df6fadf77c482febae1ab1506eac32cf49a89b3bd5faf99c204b6f27f67. 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/FR9W12320273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffd678f6433b78f3622384de578e7f34aae967fd9e1f509ed4618593e2f82fa. 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/FR9W12320274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bae24945ce21a19bccd2ee7f68fff7aa07c333b0565cc73e461113013d5dc3. 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/FR9W12320277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13658109ab0dd62b2a797adf30470233298b6d5717bfe64a7a7211ae0354ad53. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/FR9W12320268.
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 0x735044f67ffdb5f37d8cc0725941a81554031a2264db6afb3d983c7a9baccc02. 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/FR9W12320269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91eff3c24a9f28c6fe3103afc0bb1b3d1265652353359517f1d42586de857c08. 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/FR9W12320271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf412c4e2e2c15b20d84b1c9113c137f60acf83733b2fb8e32878cb5ae75c002b. 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/FR9W12320272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a83a4a72d2894f8630c15edfbc16d21e8512e48a5d23d0d02c736830b328f. 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/FR9W12320275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf8628219707f07fcc44faa50b75c08f7862c0c000e72a26756e6deabe92fcc. 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/FR9W12320276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b816103399f14d595e95f186c9331315681f1e03ce03e4c324d0ed78de3f38. 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/FR9W12320278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b68512f1249aef734c63e08f1ef5c66559f76cb97140ec9d7de9e1e963d59b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR9W12320279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc76d831232f5e794864930363eaf68a7fbdd5754aa19725c68d72d4ed72111a. 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/FR9W12320255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9c6f104094995a2f2ebb60ca9817fa38a08135931bf5982873a7f639b91df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:24:38Z), 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/FR9W12320256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ec346b1a9a9793155517e913475f88322a0450c58a1ac9c7f2331663a855a6. 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/FR9W12320257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eecf3213c275143fa90ea449a92c40a724bc32be1ebafe6142961c71fb2184c. 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/FR9W12320261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8e2576f51aa0d71151cc2324b846b48a1c99360f07368fcf9ddd87d15e0be5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR9W12320260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302367f8bacf3d7803a24dffa9747153047cfe89d9cae2d406884bfd7c076a69. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR9W12320264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217d2cc1cd0c91cdfce1e9a85497aa36552a047d17f7af8c0d877a800693b254. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR9W12320266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a1fcd375f90d4799a72c1100d4fe893bb294ec3d67b0316e4b4ce244971f7d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR9W12320221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a5295bbe75f49e723f5b083d5ddb431e831d2b2c38a95fb633e0dbfc3809b2. 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/FR9W12320223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f8e1241ccb90a4de3e3877705c20374481ea8aea74ec0670a9795c4fb2885a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR9W12320224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ed50bd15c99b226c116f3af288ecb8c872aa0516b3a3556499dd43390389c. 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/FR9W12320230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7130c19ec07f4b2516ecfc744f357dda1ae76b5643c776a8cfc2e2804ba55dc3. 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/FR9W12320225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c329fac1763c4aa49cbfe70eba32e4c8038cec13671e57c8e33072e1322a99b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR9W12320231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb274ae5e355dea7e75cd37d3dcf266243a3d9eb584358073a9f0d9c0b920caf0. 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/FR9W12320198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04f826d26da484b349a5d67338bed5a408c72a6847cf870438795ae64e3a15. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR9W12320195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7027dd885f0700a76c41687a5ec0263a4e6a069c8d04d4878334434a543e26e. 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/FR9W12320197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ff40e6a05bb17ef78af1537702d67affa6bc386d11ef54608239fa0fd2c627. 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/FR9W12320199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2583fa1e385ec1c74b9ba1f63d7bb3b168cfd1e23d8c452d6cb9023c4bfc32. 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/FR9W12320202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b207c195e667d1be2f4f01231df0c437931e9f1201e60a8c846aceb32c59196. 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/FR9W12320203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d7fcf8bb19f261166a7a528a6539a114a6b4935b2dddaae2044b32fac0e5cc. 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/FR9W12320204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9c5cd2829d741283ac1b99eafb69cc71123346503d581332cad57a10523d1c. 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/FR9W12320193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda333a2de4a5b05a09092c4e9e4b81e8274f7dc9bedc142a7756b8327f425d39. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/FR9W12320186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1162ba7c0b87de52e2e6b01bd12287b2c6ca99f9007c6705617be538b3b4e302. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR9W12320190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b94c89bc011f3d5fb79abf84b9dda00e8ad2501c35aff7e449f0e73a1fa07d3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCAHS2335329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e16e698aa0b8fcc44837ba9847e736cd5bec00eaa3f0a417c26335166e32aee. 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/FR9W12320194.