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 0xcfc9dff180c539795d5b80874e2dea9ab6c0071ad7cb04c93050cb37bfbe1de2. 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/91239a5a-06a9-4563-bc9c-2ba14849a5b2.json and https://artists.proofprofile.net/proofs/artist/91239a5a-06a9-4563-bc9c-2ba14849a5b2.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 0x078b74377cd067d891f21ca554da5cc613f3939f583a2a6f6481e0cd1bdf422a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USSD10900573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8b2a8d07413e6a4004638ad4a1fe5204e183e04fd8db53427474cb71807070. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USSD10900571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aaa4b17241f3796d1ac773964404791acc0bcf1041bdcc029a093a06c2f91d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USSD10900575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46df21a1b7ce263b9bd8e5a7e9b2a656a2db1b44582d0011ac7322718eca4aba. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/USSD10900579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8103795b094a2e723fd793304ebc41463ec3bcdf1d3be708b7aed1dc43347f68. 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/USSD10900584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc7422044937c96de55abe7b17a45284c591b0b1616787477d106a983691832. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USDHM1630945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e96801d0a20b48238714ddcdadc5b055783d6f6658f9cbd852a7dbc838dce86. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDHM1630946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06630b3795fff48a29ccac3a3ec62bba12519d9b5cbd35563fc47a79a375de0. 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/USDHM1630949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791660fbc9e1ccc1f7e1e379e0f3afd1c3cf91c85bdb5e89a6ebc4cf4a40bf58. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USDHM1630950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3f7334e1558d86fcd292d653517967d11fed697e0544b7bf9a545453fa2c9f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USDHM1630951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242fd466c9cac3869b048be7fbad6686c3670e2990f42be39d1d7723da57516d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDHM1630955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d547c915e4f19ad6717bcc5319bbf7bd627a3e5b92c54842afdacafd090cc2. 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/QM6MZ1850406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5cae24d55700dc15637469090e70fec4e3bf8cb1aa845d58555c03f307950. 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/QM6MZ1850411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60da772b3d2f5ed613752f896e2c12023d4d38ec1a98678a87d3cbd3276dd06. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QM6MZ1850414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f9d2b4b81c0608e2eac877482718d5fe108333abb3903214df852e24e36ab2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM6MZ1850415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930d826c9138bec4e2a3dd84c224486598516d5814027ed8c86c4b94ba918445. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6MZ1850416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b760d7dd28e84148f1720a3b3152c717fc2635a8253e6daa4977209ac28c0e. 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/QM6MZ1850417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30c3e9eb651ada6a50598d278991f278c7518f9f0dcb97b4699fcf5892f1216. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USANG2222240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1de67ede25ccfaf18f791147dd67453bed00dd6c25dafd829a31a46283f2f6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USANG2222243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0e3806bf0ff23114e2d3e660c80ae47427d510674c1ab98fd707c78ffd5802. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USANG2222250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532c2f4cc54c25f9d75e31ca7bea79131abcd109cac1c341a225a270b0b8aea6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USANG2222251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476389ce49dabdc5f9a8077d6da75234a484f21543279542dff7b0d0663f7f60. 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/USANG2222255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545999bb239c090767755d9a6659ae54f4ad76a95fec0ac397c6291c127a26d5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAJP2552658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0fa14e6a63b05b21071af6f286a4215d20014e3466ea83e5716eb426de4717. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAJP2552664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e2c82aa93c746ceeabc1838b109f293054eb5a2a0a73c9cef207970e25225f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAJP2552699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ae8a0d9cebf1adbf6abbd2e89d493f74d1c6d4eea38307576d34989a4d6e1. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/TCAJP2552674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b46158635c1294f0f12ecfbb04e114498236024e84d2b75f3ee8a4e26bed718. 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/TCAJQ2552678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4aa04b9b6f1328a1ff16b5e1e3b8b294c56320744647fbd93580a254675e6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJY2571165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229ba85a477c34598e410e3d551f3d189cd8e383d9b7e5be39e8c0bb3636dd21. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAJY2571771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f4704732963f73831188ca1b1be157059eae2657cbffd551253e46637dcb4d. 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/QZDQH2361823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675ae5a5d9efb7214a0c9439e63aaa79838ab6c4fe9cf12bbf66222bfb3238a6. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USANG2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7af7aa11da108ca21d75b87096c6c0dc10f9f3d3806343eed17a6b5a00989bb. 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/USANG2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe834a5eb3c79b1da5a751ace8aa01e1dcfd3f5ae3720b03317108e36433f3b24. 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/USANG2200098.