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 0xbafcf1bc9c9984f3dd934a425c49754eaaf5ec491b5c7abb11ba83a3f31f26fd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7869eff7-94c7-4382-979c-f51c64d30ca0.json and https://artists.proofprofile.net/proofs/artist/7869eff7-94c7-4382-979c-f51c64d30ca0.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 0xf30fdf71f6251ca854636e97d2abb0c71c3de22290f1720641a0c2c5a9827ac2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFY2132254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa448d4d968822eff92e3aa496979afa377c7f4bc7f5fec57081a31b1b482f4f1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAFY2132258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee700d34d1d17b5c2c0b0c08790899561de601a668f3fbd65bce66af27b653f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFY2132262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b25866548374fcc1cee05d7d742468973c87192005bed88fa799bf99bb3b75. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAFY2132307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce50263a8ae5573bf533d1cf019bc96c8e237902188befd07c0922c9764cfdf. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFY2132310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099ca9e1509927737970f5d46bbf8c9d2d2334255ce38f97bb50815d4d8a334. 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/TCAFY2132319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c620b39f1de7d50dd461585639dad86099e4a95480a9177bd80a7748fb2cc6d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAFY2132321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f4555c2cf16270866d00ea91e412b23f1f9cbff4cfaba510817dcb5f6f7576. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAFY2132326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dc139daa1fc2bb3354bd1b53df13043b01218b669520a56a23149acdb7fa41. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFY2132329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63201a32d839122c6b25118740c0007d04127e1c8de58511e37c8133c7f24fea. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAFY2132334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667e4e7ddd85bc2cb6bde6d6497a96f78fe4a7a1fb44f1391d505100757d39a2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:56:43Z), 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/TCAFY2132336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a404bbea8e91e49b5a39c0527f6608a488fd36a61fe690f3df6b29895e8313. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFY2132339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77342f76f68a111b5608f573035287379fdb99e6d7735650effff144a9b39ba1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:52Z), 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/TCAFY2132345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5ce3d7a6c085a6f829eeb832bea00befa868d751099b4a60a136cbdf36b58. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:11Z), 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/TCAFY2132357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830e17eac4c56400965d12702e3281027b03229a05c1da3b52f00f940b7adb8e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAFY2132358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de1d48614d9d008c4493f980b8879f48f2f6e34800a04d5575b1cfbf2dcabd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFY2132369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fc566bc1bdc0bbfd211453e593ecf05ecd09bc23964c961a812bf95388a6d3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFY2132372.