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 0x16997f9c9f247ab0013c6cb067974dd99096859988223b7f93bb85d07de2820f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/578278b5-9e86-49f7-b77c-392f3d80c83c.json and https://artists.proofprofile.net/proofs/artist/578278b5-9e86-49f7-b77c-392f3d80c83c.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 0x775cad467ed036f68501174d77a7ad4569e4fc8cc0645df4a5d996c695b12907. 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/BX4RG2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d9f9a7d9a30ea33bcc6abae7e5c451515fc7b41e7f49bd8289ba29f66b321. 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/BX4RG2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec05040f1d59613507a4addd3acea0bf8267bd749c21eabeeafd26a68c9d6b5. 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/BX4RG2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8412fd323da00a5396021502224851f9e4228267d3c847c213b6e81650a2925d. 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/BX8H82200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a6abe2f8a19d34815e8667da6519adb694c817296c1ce308503a80760c17ce. 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/BCLQT2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2728932ef88e5269ccdcf1b0748f9fc06fddc414e44fc5d9679b08229277926a. 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/BCLQT2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3139569aee4ff91c08f3362b48aa028b69a4e193c901658e66560f274eecb4be. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCLQT2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2025ac9ae051c101daf03d13d37650a649df4517bcde6a5fe32eaadb3e4686. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCLQT2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1452e9f92ab57ee164904f29cfbecf311450eaf70c58d7ba3c14f241e295882. 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/QZMZ92181289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9aa67af5211ff347049d88dfc114a8ca9bb201c79b7f7be9e4676a5ef74757. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXYA62100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d32cebc842384133611e5908814b3e29afeaf284aaa2feb8665c3891797fef. 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/BR3WE2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68da007a2a8b84bc33eb6243b554bdb30159b785f41c7f8178c41e7397f98e68. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLM2176640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe399e9e11ae0e16ec93c177c923319c476293249a07d745297a72c83870ff5c5. 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/BXIV82064808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1236f803f2590836cbc4ce55a8db6cacf65119a6fc3bf7788662a79f341697. 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/QZGLS2081781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a560c34ba615a4939c5741f0f4c7c46043435c165e63334bf673c55022a2934. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2081782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6039052e5eb53b534986582359069a86b8196d1c1494cffcf28593dbbe8d7d1. 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/QZGLS2081783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f0c21cbcea3040462e263dfda030e8008cae0f7fc62b4417cfad91e7530e4f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZGLS2081784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd518086cfbb81d29103530e7337e43c2a9b367ff44c2709e7722ad303b988e. 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/QZGLS2081785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f592120d95cd0f77fca0a327209fda1fd44f9a3b82202233ec173c26ab0e5c3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZGLS2081786.
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 0x8c0c46df7736b256ddb61844d879494acc0547190f3f1e0cd4dd5d3970eb842c. 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/BXD1K2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f5ada56f0b3c14a226a1b105fd24c484d36c4908a453e9384b1b728526a22. 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/BXTHX1900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cedbc7b058d9a922eb6e429d6158b9c40e73e447faa657c198e8414738e189e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1823314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a25b0977523d9848bfa12357ead86e4fb5ac6ee8536848268051e1e7e960d71. 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/US7VG1759012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c339164d01f4dc4d00b7166a8d792abc150123d2801ca1bf59b9baab37fcf6. 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/US7VG1861659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11672dbfaa921c60f86858113ee0c8a5cba5136b3178f086b13ecc9ffcd498b8. 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/QZ5AB2016274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7085dc4e8e370abf9403adfc6a85f76e1a9def920d616e59e6c376bb0c17ff60. 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/QZ5AB1993983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edaa07a84820dbca046c9d80ac8e1f33f677d41b4ae6025b085e9d56fd60e4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXD1K1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b1029607d829ac0cec5b70aabf800f0aef06145a7a1f74ee6e7c0a4d0a800. 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/QZW9K2474802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6015b318a0406002a2cf3192401f73a68d9a92c06c652d04ea67cd28964b126. 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/BXC1X2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6525e0bebc9ca7b3fbfe5f1414e5a64c4ed55fe2dc9da7317e5ceca5d5c729. 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/BX7E52400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e8846436e5bbc23d8845dfdb6de2811dbee2c32231526e78e7b444b7d174a. 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/QZHZ52073923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9e98f84d6c9ccaac277c9634de200bde616fba11a6ae980efd91cfe61ff16. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BXD1K2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7e1474311ee9256d8422a3e274ecc89fc9cd1d98d76239a0c1232a875bf4b. 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/QZGLS2579640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cd72549c66aed60f412073ad63be1eebe9e1b8e9ea292f2685b4c9d2d59eb1. 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/BRCQE2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce977132e9b60ba82de4fe33e03c5bf38dc58d3cfa51db9bc06decb737777b69. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRAGL2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d43c8efb6782fb032e994eee006283744482af7fc6ca7f91cc0695f69a81ab. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXTHX1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb04995df3a3100e7eeea01f3a957239a4a5120dcb4c68753d95592b28101be. 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/BXYA62300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bb41706d14dba7b8a499b3485b7bf8654d830a203b4b6405df4ebeb1cfa241. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ51925040.