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 0x53954fe041b5ca5dc8df6b3305cc1f5359827e4f110427d336ce4639c84f194d. 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/8b5ef910-a3a8-495f-b7fc-1c2dd472dca7.json and https://artists.proofprofile.net/proofs/artist/8b5ef910-a3a8-495f-b7fc-1c2dd472dca7.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 0x86491c0abc9ad60200c39f71ba8b9632f1a26082844f486a70a182b60bc63901. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA42316390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642b1e9dc27c54c7bbf483028bc26d907089dd857fdf7c9603f1a6cc5a374267. 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/QZDA42316391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d98f16857a09c53279497b2452fa998e949c2a88d1e2df0828b64a92432238. 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/QZDA42316394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b3d92450571a802b35b670a9b6070fd751d176436c2398807131dd2244d850. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZDA42316395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7234df7e8ce375d8c7d6685ae745b342dc8d1d2ea89ceca9830c3c52c5d22. 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/QZDA42316397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac01935d7cd9274e9a41efdb3dff1a0ee46d3f2be23b22d12a1e725eb5edf5bc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:26Z), 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/QZDA42316389.
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 0x4290b01ff2e76b6c766fea1f036d781126aef7a35976d9b703a7a45a7b1c22db. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA42316399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2f34874cfb289925f1ddd12c013eeed0e5aeb68655db6ee2acfbeef21be0eb. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZDA42316392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20b75fd1c29267d315cd7c040c4950d9ce44d4328556370ca8c516069bf0782. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZDA42316393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df2f52c767eb6f1f1a1b04053480c143534b5f3ff71188e510ecbfc6677ce07. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA42316396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95131d09da0a5614573d852da05737a60725b230d2330c337db21c12a9a2db5a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZDA42316398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad991e7af1765c21df948f13aacc1fbb9d9e7bf27e3f314e90557d17d1cbe865. 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/QT3EX2461962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9010bc4697959964de12e28648929de6916d65a203aa5934a0aa608dd5251c4e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QT3EX2461963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7775b4badad22977ba8eb7256c5b2d346aa04b8eee053dbd2c11472a69c98f. 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/QT3EX2461964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755620c5a1b6daf2b8f2dbbaf859305b9733a4f238f3e5d64f38af5c81bd2971. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QT3EX2461965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34666215c72dfbe1b0ddb1fd0663f471c86a1fe35f9b0c7b81d98b865d2721. 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/QT3EX2461966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cba886d502ad2a4becfbe2e5b21ba59855402f4abb87c215505a4dec5fadd1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:48Z), 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/QT3EX2461969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea352a13647eceb03c9b7f0279aac6866da25140c0a2a88491695842ed82f3ef. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QT3EX2461970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139cbf1b4aee80ab01542526376c4be7615ff935aba072a1af48b74fcd99126f. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QT3EX2461971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c67f6a8375045051e4d8dc5ea08fd4d1c983ec6ac96ef37c9b08d650be64e39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3EX2461972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f59878924b0e8673ef9b7637c738d31fa16c5dddf00d11c308463f4386920c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBE2569716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd323630fa042e47df2a7bdf8f88080a47ac0a161ce962c9b7a30a088a2b47b32. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:50Z), 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/QZTBE2569718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b9cc82887aa31d4dec38c49b3e168fc179f74de276196d1d3616dd4914c914. 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/QZK6H2592140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449951b0744aabbd376b5526f092124ee00516871a4fac696d1a5f0a548cfb49. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6Q2510797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aba6d8b54b007a8b8c2ae46d969b553d8a2c16aa17e53916bca80f4664f4b7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:31:09Z), 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/QZTBE2569719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd76a5076ac02e7c46df902bb7509cf5f9c674897058808b81a357484647028. 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/QZTBE2569720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a783e6a996a5204fdd51bc4b8ed1e8ab4b99171945211c08fdd4127ef22094. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFX2587201.