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 0x4246c7349d793477a0ba6694dcee3715feac1d5dc8c2bb4d8c55c0be3e6cf565. 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/f361778a-7540-47d6-8e7c-a168b2e5da75.json and https://artists.proofprofile.net/proofs/artist/f361778a-7540-47d6-8e7c-a168b2e5da75.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 0x1ffcf973aff465aac226ab38cead7e97c3013195c0ea44c18546fa558d1bb794. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2471444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1c43f2f26d3c703b505fb0867fc15da560c4c0418e3fbb013a5dea141af072. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2471446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9ef9066f3f0148c674bdfcdb1db0dd9c913562194ae0ddf022d17bfffcf98. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZZ7Q2471447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdae76b3377ff4b7aa70640221b5e2ffd07278dff12c1c7685f0a868c144bf52. 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/QZZ7Q2471448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3e7cb00f148a3f05dbcd736a08b4ed168a3410c4dd676929aef50312aaa78. 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/QZZ7Q2484278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3029e2bc606d93b0663ae83f4152b0bc1e6456fca5765b45d8755e5df25a0c70. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7Q2484279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0533ab8d296c692c1a8de498c678a37d203f5b00aa05a2db577a2d09627668. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZZ7Q2484280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1165e394baa7ac76ba393b9e77192cf2666180c9d72af299c08849df0271f8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2484281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0939865e3926d888bf4fb158a67a076f394c68b41030521b63824ac6bf5de843. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2484282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a060ba9211494551484fccfbb8458007c1efef01c07803fea15cecc23ef5d7e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZZ7Q2484283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca1924215c1dc37859fcf04daa4224de3644e517978c21ccfee72cf9e805d41. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ7T2470717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeb6f1e8d5cb84eeb75d39e8dca404fab67d8f4caa3d2cdedfbca981e978b15. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7T2470718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e04cea768837d0ef78462420af2376b093fca3a9c6cea411e9b492f014c9a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7T2470719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996d7c4adcfe0b1f5ffac47bf3322e1e4c762c3ae47a85ac6221d7be6062ae51. 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/QZZ7T2470720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d32d1ecbf8f02a84b1621ed798d60010e7ac6aef681c1f3a876d6e78623336. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7T2470721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb0d43cc0acc3ccc3362b72ce9fc5ec92327bdd6e54a5f063d3bd146b66f8f9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7T2470722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9360fa43ef8dbfd6a8135bd6d0d6801eab4705e00849043087de0c29519995. 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/QZZ7T2470723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e7948e9543f70f71e341e26f70ec74bcae41eeb94dc6af9f6e80f7dfa67d5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7T2470724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb0533ce3e155b476211c936f41c7eb485a64f2f39222a56d4825d24704061c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7T2470725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d26e7ace437af82936aeb47da40ad7083f0a8561d42b221aa5b79238e850655. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ7T2470726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65137179636e3ed8b62718f4e4e7d073ff7e625beb16d62547be2fcfd1f7eb18. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ7T2470727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed4936ae3acdc4fa8715564846ea7ef9c81a13e5d4fb2b0c6d3349529483a4d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ7T2470728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591d654904c66d724e7841b7771ab54976d3e111a1dfb6e010f85b8da9865e37. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZZ7T2470729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d137fe8f1fade7045031fcf2e9223a78d149c24e0c2e6146419e4bd95584c3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZZ7T2470730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b2e4ad731236799079982682162ebcf5bd937c0d72019749a66d97abcd12b3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7T2470731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3270ae7b1b7b46394ce4b100198a790daf8b48ca39684ab132f073f2b213df9. 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/QZZ7T2470732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e4ed705cf368dae6236fe3ef75ab57636b9a25169ed2b91e1a20bcd8db616a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ7T2470733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f41c92b3a3cd8e4587e5a08ed6fd484c344b3a2dfc59a3385ad546fb9e734. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZZ7T2470734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2bcd483e4ac8c7b889e1bcbb72d9f7e9cc54bba75261bc330d851698750e3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7T2470735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc436e106fe10cbcd506771b85c4397e4517b7bd2413fe7c7f7714e0c2570b9eb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZZ7T2470736.