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 0x8b35427bb0f9bf446e35d960d61758efd996ab57a719158fa9cfc25ebe4e9636. 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/e2d6ec93-367b-4ba0-aa08-c51ec4d802dd.json and https://artists.proofprofile.net/proofs/artist/e2d6ec93-367b-4ba0-aa08-c51ec4d802dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc5327edf51e618e85412e5f71fbe43853112b2184cc7c13c224f0144930dc095. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/US3U80501626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648a099fcc6df98ec56c968a20adf792638860d28e72d885ea9103b53bc538c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3U80501627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537d9212c0b36c3a21d57eea6e00b624db26c036535ef591622db1871f456d98. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:07:17Z), 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/US3U80501628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2bb483de24e764f56200ebdb6c44d2f09be71a47e09301a8c120d9e5069ff. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US3U80501629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f63bf7d6f30a02263d57bbef402ab1111f1b5f33c4aa76945adb803a218c234. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3U80501630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7210ac2d69fe4da02b328fa4f51687932ff37429875d40464ab66cacaed3aa66. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3U80501631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dd1f34dbf0433187d26ea041f0aba2d1288e6099827566cdc306368ea88c10. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US3U80501632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9776c921104bd84c192bb05e5edf27cfc80098b23c0a4a9c92625c6c17b201a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US3U80501633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a52d5e5649fb65e39c428e41558373fbad26c558fd6f4a63aea2f28fef7f95. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:48:22Z), 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/US3U80501634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa231669fe2f95a3c93f6076b7b0ab878683a44bc7910f68a0b01a7cd87d2eafa. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US3U80501635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f4c42f62a321afd294a7ab8fd6e87309427c86b53b81418dc62569c9581e70. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US3U80501636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffecffaab570ccb3960230ef6abd8c9b630a65e0cfeb7b4f79af747cd50970e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3U80501638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152b831d827c73dcbab7a4ca3f386cb5b68b585d396140d3ade6bbd0f868324. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:33Z), 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/US3U80502387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb736019cae8d73be5a8a48ea9eede0030a1ed6095c382dc0fd6a2e92aa4c5d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3U80600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7776ea3720204ecaded02597b5099ceb8d38d42be0bcb090f9be9a31547b76. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3U81000457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38ff6a6a8aa4361778948290b023760ba67b134db428c3a7f359c636a53be67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3U81000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd603c83cb839b399aaac6908dd067e2d5754cb08f01c499e55796cd8b0b89. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US3U81000469.
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