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 0x0c6677ff9360625e0f0300ddf82f98aada0c1a8d3064b25f17c113cdd2073dbc. 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/28d1cd12-dcbd-41af-9264-0a512f1a3919.json and https://artists.proofprofile.net/proofs/artist/28d1cd12-dcbd-41af-9264-0a512f1a3919.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 0xe4331fc9030e59252a929e4d672ce5fa03bebb418f7e668d6922b53ec9aadb8f. 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/NZTRO0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c2bdd8335b7804acf3bade682053f5c42a5512ba5777bdf7c9e3e5a20f73f2. 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/NZTRO0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98965281401d0a5418a88d6ae4c3ed79a2b3e639285284e8d34cb7a41d9344df. 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/NZTRO0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd36c8fd9053105a3ad456528083a66d9059b61ecf3caa64d1b299c6b14f511. 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/NZTRO0600011.
Waiata of Bob Marley, Vol. 1 & 2: Ruia & Ranea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1c397579dd1337a17215d70a45846d9f7c23cc645f494d2bdd6683b8900fb0. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/NZRH01600198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d680faec2803c9ad05935af333a7f9fc24e4a724a0da69afe9991c7399a2c. 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/NZRH01600199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f4c4ff12ac2591329ec8a29f543197654c5a451d72f8f0cae19027417fb72a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NZRH01600200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a33df0e988f22fdff85d597b3fa4a95c14ae9c4091bb6b8306eb45593ffcbcb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NZRH01600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ff87f035b1291814bc8a2627a73c4eddbd2329a933bbd6b806491822fb3f7. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NZRH01600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec5c650074deed65f8b316eaa97140e265734225b2bfbaa3deb1081a4208be6. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/NZRH01600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f3f522429afe24d85f8528bd4df69c5c2036176babdbd1126dadfdc362336d. 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/NZRH01600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9438779532921cfd673526e360aa04591ee41fecf16c1c8e8d258df3b5793a7e. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/NZRH01600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b132ed5df484242871eff721270012daf7d441dc72dc9c11ff872f1010f65e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/NZRH01600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f703c3ad25e3258a95bfd41d282cae860a2a4fde8379dae86b2d09fc444c48b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NZRH01600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5079c23aaad3f2eb4307840d5870e0be9ff329070f005a6f010ab0ef7a814. 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/NZRH01600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeb1f9ea46ef47f60c86743741ee9a09d3dbb21ffab21afebbe3cedfb84306d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/NZRH01600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f28db543b40b2288545801c182da57b49b007476b6735b34a28162dac5b30f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NZRH01600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2acb21fb5907ec6d6a5121367a926017288ae9982b8e7855a3383a4a78966f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/NZRH01600213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6d3ba306f5beb3c91a5195214ec87167fad770f613eb69a29ceb2dfc07ac3f. 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/NZRH01600214.