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 0x072a2e3f22f786849d92a54ec3f1784812f3a716c8e068cf008aab1ace10f300. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fc4cb8b-8d69-4974-8be2-e35c95890151.json and https://artists.proofprofile.net/proofs/artist/2fc4cb8b-8d69-4974-8be2-e35c95890151.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 0xe0aa4ef9997d2335fae1a62a7faf1c5668e4eb1de47164d07a7b436d78a69243. 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/GBZSD1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab42cd3d1a95a0d359485c669ef1a21ad9e86444b15e718af49574c2c06e5f. 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/GBZSD1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e62f17e155c4e193141840af2696a5382ce257d776fb8d7c28bd4c7618890. 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/GBZSD1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74edc719bdfe00ebc9d0fa4db2b5c0694537854d37e57136c3e1ce1b62b4e85b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBZSD1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4893fef7886c1cec3d7b2f150493250bbca8d3ff2539181f8ff9b952362baf2b. 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/GBZSD1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c768894d44eb7bf3b53d0228a81ec3c67d081b8b10cebf8b2369b308d5f3e2d. 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/GBZSD1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8fdd1762d4d1d628ca6d2257ded1c2028dafe59bac20fa0a2d6f4c4490cb7a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBZSD1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f1109d1469da32145644b28bd0c071807e69b7a8c685ca6dae0c820114b6cc. 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/GBZSD1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf9d27ad55dcb30b8e225a7f56c3ed1da1f0f6aa77a15233b993470a80fee68. 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/GBZSD1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fc9b05a3745a1f7b82562430f3ab1e67389e2e6a3dc60be968266e0e59238b. 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/GBZSD1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d7b083839ab4295ed4b21002e5c5da26101a5aa8e62d5e88970371ec5e25f8. 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/GBZSD1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50921ede5c6785250113b829369e77b1aac35b41951401551d1d075f572e884. 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/GBZSD0900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87f7c86ab182660936376cb3a2f888be43222ca0876498c489c261f5e93b950. 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/GBZSD0900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda7f2af683a2dac4ce13d3854fad04a6ac384ae987da0c2682c889a3cd29ee8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBZSD0900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8187838c26be0a7bb2c9b579d8166444596e13b8a83591fa7b4946a7090ca221. 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/GBZSD0900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e154822837c4bbe96d1529451e567c867cb1d8cf28d209ae9b47fad29ac3e0. 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/GBZSD0900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d0777b1da5715e581e87a29565937cfc5f6a82a55d008515ba29cc7802f404. 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/GBZSD0900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0748f8ed09653c02912c44d39c01a97ff47ed6af685d4fbbdc2841a75925a7ae. 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/GBZSD0900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ea2b1bb742f4a63196f3813ae73ef55cc47257e0b5923b46c4c773e282652. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBZSD0900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1e65724423da962661d601acd4734dcf5c5a9a7cb3d390dde49f81ba01362a. 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/GB8T51300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02554e75c9d6cbaff645203c27b55b71c4e3d3620f026c20a096a604053a5f76. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBUM71302833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d49dbbdc14cd3899d433a9466ff7005c627433b0b813778f6ad4fda8f1a749. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKPL1254821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1ed0d8ed1f1b29bece8ed4d949d47efcbbc86d8942a07dd3d4be2eed82bf06. 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/GBKPL1259739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11309687906f3fb5a391a9523882c0ffc7affe05ac6b291c6119dbaf968ae26. 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/GBUM71303554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ded567f6b88546e3bbc84522f825924ac2204757a6528cba0b55f6747f9b3e. 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/GBUM71402454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7e2f2f1638ff3d0341f4941b20b6921883049d30db7e5d1477fd2aca2a3794. 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/GBGPZ1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c4b7aed320cefddf67f7f6fb3e5b079c08f22a97e269ce01ca141896a960eb. 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/GBGPZ1300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aea9a0de04b3b8d30322dd434e69ec2fc1732bbc56399d469ec97aa2c5b2bf4. 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/GBGPZ1300017.