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 0x80ee0d2c55baac7a32bb1610b79bd3e543ac9d8757ab6c819a6421e2998dccf1. 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/a3603988-5d55-4ace-b897-5a74fc813f81.json and https://artists.proofprofile.net/proofs/artist/a3603988-5d55-4ace-b897-5a74fc813f81.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 0x41ea307747e2f13899204a7b14fb872582247ae4d17d8522adb9e8b7049f9db7. 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/HKC371642930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1484423dd34e2979762c82051603fd7b308d26c5195ff94838d4b677000681. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA092327202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9983636cb6e240a33cac94b3384677822e766251d80f0e939dad57e133bc0df4. 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/HKC371642932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bc7d3fca43e05bc5bb91101a1a63fda8f639d8d7da860b76168587130c29b3. 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/HKC371642933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5993c17d6ed73244537bb9e9afc7115a0bdfbedd5303c55adfda7c981eda784e. 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/HKC371642934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedec294f80d046fee3f32d50c9fe0973ac6290ca356147aa9801187054aa132. 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/HKC371632025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa099fc9513cef649ab4b6c5d7a37e2cd97d9c8b5ba681eaa6b2a3a50b8ebe2c8. 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/HKC371642935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898acb0c8813ba9cf9ebd7e4d720ae53e83a0fddf0a858c9650d61063a6f520. 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/HKC371642936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3361c9bc1bdef7ecf82c36a0cb9c174f7c2be7ee15146f7af27201686b4090. 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/HKC371642937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8b9a832c30904e053ebb2d010ec4eb842b8b50e0f60a43e0ad6952964fb52f. 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/HKC371642938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a72b5b1fb92f7240ca1691b087619d0fa6c458e9b4de59567e037713db078. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKC371642939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681a9131e77cce431d56cedbc2a779798805a7d864fce614f212905e6ec85852. 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/HKC371642940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38275f0bd0c4884f138cda51655843b881444c54dd7fb68a5d96d3c942f37ea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR10S2081053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee6dcf2145765b61345ed18f82e750f8f859632fc93a169616287c62d5c7ed. 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/FR10S2081055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb7c2110b08f85a423d99b7e83b528710a71162501cec4a28014ba3b6692b5e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA092308741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a52b4b6f0114763861df13c2bb291f77b8bdd22618940df4f0bdc7a9999d80. 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/DGA092308742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a509ae348610c9affd18021060c9a19e8343407dd860240a07c51187236012c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA092308743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28700352581d7b5a3a7e1ff2b83bbdecdb31f3f29c88c04eeaf2ae5695cd1c8f. 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/DGA092308744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f18c35688273deb9325a74c342685ebd330902699014a22fe448543f035712f. 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/FRX452285601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33d8e1077659c9c45995f1d6340ae080809fa632a0ecec87db8d01c52dd18a. 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/DGA092308745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f145c332a5c3f8b7abc148e282c799e7ac36b0d4948552a7689d1066da85d1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA092308746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c936c5d4c5bf698aabaecdedf2d1e31d5b148746e1cc6801253506cfc5a4f. 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/DGA092308747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63b1ef674c50b8f0ed6dd4db39c5d9749dcca8056c81c26b6511c1f9e9879ac. 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/DGA092308748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064a91e59fc9c0584e0f82ff6dba8888907d515198b86b1c86b39c6364ee21ae. 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/DGA092308751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c13e7c4bbacc8c1608336fa725a1df12a30325cb730d48af682f27c9cbe8ca. 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/HKG732413009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0df6434ce9b1d503e8b5b7a060b8caa8e54243e79fadb191dffa8ed7575baa. 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/HKG732413008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2a57eba059900df5ee281a5654be4b532d59c26979128fb7167ae8d3ec279f. 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/HKG732413011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794853efedd5619118055a881543304b0fb20c44818a758e0e6251e6cb01df49. 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/HKC371642896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaae105a61a7d4dececfafccc45f95b64c12902f2567cf4645bb241b9829f8c. 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/HKC371653292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c5f48e48e9a572aaeac56f92eb8092fdfdd3514266279e74546b447e0ea73. 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/HKC371642901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a484940bebb2d93b65be7803d18656a0393977bdc59ad0d4b4dc6781df90f3b. 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/DGA092361180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04f230bd944e610d481440b0dcd2a689292a24fa65c69335809a8dd83a059bb. 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/HKC371642911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1901ac6741602c0fddf47d82446574620ac36e29e1018d95dac85815f15175. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HKC371653295.
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 0xb7084937551666f45d50e06db6eb17a29570aa5ebb7fed471c61e511e13d2874. 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/HKC371642902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5827d398495c1f3139e4cbca22d1c8890369f4344830ebad3094e753eaf7c7c. 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/HKC371653296.