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 0x7035099f3e5d6ff4f9e95c11fbaab191f3f9dbf5e0713e9d25012dfa15da175e. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a35241d-88d8-42b4-b536-1939623a0ecc.json and https://artists.proofprofile.net/proofs/artist/8a35241d-88d8-42b4-b536-1939623a0ecc.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 0x56e2271a1fff185b396a068345038cc1dbaddddb3fef907e93b3ed8b895fd529. 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/ES78G1530001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28523d9d3ca7bf35470e058f9c7fb0b2818e1be5acaf94dda98a53b92b5ae1cc. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES78G1530002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1067a325281d92be290e32f0a98358bf43457a75bf7afd42f31be1a6f748a5e. 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/ES78G1530003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401aee94c8bfd6e8df2865e961c987cde80133997ab27fdafba93893619bd6d9. 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/ES78G1530004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41111ba5d1acb11f92fe2fe8d2be449917243dd403238261ae5fecd6b40dc6bd. 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/ES78G1530005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d2c7fdbe5fd6fefe3cf188113ae61f4d47d6fddf6ac7087dd3b67f74941920. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES78G1530006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd07ddb000e418b559b1f34d8806873776ed4541b09b93c5fa2aa61b68d7fa9. 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/ES78G1530007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7df6a0f202d783b8ceda5374317625c9f5e9186827693412dcdc9f5f1c37e8b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ES78G1530008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46616518ee76263905d1b3f0eb2cc1b97fb8269e7f58387f1c3d9390418a657. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES78G1530009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860bef2f07b95167c898bdda079629c4ff47bed12c38380e8f74467122ae41cc. 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/ES78G1530010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0197a7fe2245b998ca8d76b9d16a9955fc4241e25867a852998cc0899bf8e9b. 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/ES78G1330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86bad118b368ccd5c40fd24ffd34325ab433e91694d5aab89a2aa4988d328d2. 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/ES78G1330002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f34ddad280b936a9fe77e9d8d548fa342225fe0a18cfbae840cc80a217b2fb. 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/ES78G1330003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e660c87339156d186aee68c0d932a22affde873538aabf1c65bf645af02c85a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES78G1330004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123da0354b1b8aae81e3d608d005bef02bd65fd77f5ffe9aadc170af8b00f719. 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/ES78G1330005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3f36f111bb54da30bb33b00c05b6d625bcaf62eb28b17b8020190a55af0ff2. 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/ES78G1330006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf971761c80ae371082aa48160cfbc28aef1a664f5d6dfcaa4c9cf0a9aa4ef361. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ES78G1330007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8005dfd8e1d834872303b04beeb6e5748e64f79a05fd884f94cf40ecca51f69d. 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/ES78G1330008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a9b0994b1a383f1076635031958191e837f2c8993a2b2cf5f518bd476232aa. 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/ES78G1330009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbafffa639297b155dc58fc1056953d5f55e7c15d5181ad967e867bf3c469599. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES78G1330010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d0f123c04dc7ce40cb1d409ce59c02e84b24393c2ccf0d36b1b84822a6fbe1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES78G1330011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f3e749d8b82f0491ea6239cd0ccbd67fa13777663479a852013894f1aee957. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ESA011001216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7281822c0030a767ea160cfd7e03d24b73245a06ca72afffa8b53bfcd49d9483. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ESA011001217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a0aa50cc08ea7d3c6f34994c0359c4138db7c236b1ee73dd98e5586822350c. 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/ESA011001218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcad2fb68e15e2072a004fcbc42f8c8e973b29e1f07d99cc93142e08c984309. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ESA011001219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3818b29687913050c74181f199d66f48587b29b4e02fcf6ce391df83638c7e35. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/ESA011001220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f03fe4897708b2ef3c512fd070b827b588a07fc015f00dd61b1bbba474e600. 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/ESA011001221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ce0f205a8ff4863d58fc690c95e734af682dcda674484a10da92bd1cb00c90. 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/ESA011001222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf46a4afe4e5c1af97d35bc03c1f61e47329fdcd1fd0ac6a627a494c3a9cd5fa. 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/ESA011001223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30e8ff66dc0c5c66edeb2751f3366f206948d6dd024a26fedc180cf5ec91a6. 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/ESA011001224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1305ee06f35e12170f9cb628ca9778b1db0e6bda8a2ea4249361d2c398b4c11. 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/ESA011001225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc5c0fc8735c45aee73ac8a217a7cd4839dd5260947012d8dca14a6ebb557e. 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/ESA011001226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375229ac9dd3aabaf79b027f00034a11b636288f21584568c7cbd9b83a0d927d. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ESA011001227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70258f61d3d48f897750e3c429e84da931081a227c9f96bbb8e9f89b8f2d66. 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/ESA011001228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c250830a83d57c2c6a0abef0a5aeb684bb73b5e6320f75fd9e26f7242d99c61. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ESA011001229.