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 0x8be37a8d97b4a66d9faf78ed2a22fbed94b3cfbcbeec215f86182ea512d15e42. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba016e2c-152c-4a27-8719-a8024a6a1c7f.json and https://artists.proofprofile.net/proofs/artist/ba016e2c-152c-4a27-8719-a8024a6a1c7f.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 0xb8dcb322e43e1aa91395cc7ac07a088a4e4d55d93c5a8a59aab76b529aa7ea63. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:10Z), 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/QZZ7W2523510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553acb1de65e81351ce2ad586cd39b9728d721d6eb2c465f52087b296fe9b992. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:01Z), 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/QZZ7W2514070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a702e275d0cbe4146b4793cc1918dc4dc0f98b94d5ba306cbae5d034b7ea092. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:31Z), 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/QZZ7V2589744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85041fc490aeb0c8188f8f84825ae0cdf15a8582de24bd28a8ccaebe601d3139. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3EY2547498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbea276f56d6e6f4a80dedb9c8ef6a84f059fc7b4af9228a53a493c6ad019cd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:16Z), 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/QT3F62516900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64873fc36fe28abb1795b66fd88aa0a69c4f9e88ee018605f01671d98182e84a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:10Z), 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/QT3F62597401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841a66197cfb57b81ab2e7f2d908b6f4f9aa25a019bd661af31c598285278adc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F62597402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17110db0f8f4b741f41560d8090ca4d3e756be3cd2ef09046328b623ba7770c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F62597403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e3a3873e5597b8c524112bfb0f8b5c3dbc9657ff22b5cbbba744e4200d81f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F62597404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f6580269b3617142c262b1bd0bdf7160f1368a5c3a43ad79a5536c05b721ee. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:44:18Z), 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/QT3F62597405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0392777b0e5261e1bbd2674dd546c27fe1ebea68d0d3573031f131fae0ee27c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F62597406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d91ebf077b7ac67042cbb12693ebe006187576a8b4901302a682930025c1f1. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QT3F62597407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae433f74d737da1ab7b12cd151e9578751616ec4a24cc37f9aedd3a30326fc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:07Z), 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/QT3F62597408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c01fbb158075ee7a8193c6b5c2510f0560bb8ebeeb20fdad9c3c3834dd91585. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:21:42Z), 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/QT3F62597409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe080d5353c8713e66192c34312c22092b93a6453d7eabac2e0780833d22d6996. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT3F62597410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94289385fb77d8a85c7631ffb5cfe523b12c43a3873508178e91f89f58bc800. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3F62597413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70296487678e3f9b0becb6576991364db858a55243f8bc4fd4af30f50c1b62e5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3F62597414.