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 0x086c29d4f6b1f3d0f09841ecef98450db96f872b4602f75d72b2c3ae3c4787aa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0084965-ec58-4252-ac1f-5d8d60703009.json and https://artists.proofprofile.net/proofs/artist/e0084965-ec58-4252-ac1f-5d8d60703009.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 0x780215bf929b33023e56d676c432e867f4b7422eebf0f2dc17d58d2a2fae49b1. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZN882212848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc5c9d16da92176a6730912ec7c6401d031a77b93b06a5e8b7632e4022131a9. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/NLX9G2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7218330713a98d8a4fcf8cf57db281caf25439838f71e083ef5e82f1d412bf. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRR642201782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba839159681c34ac0768cdbc25a17eedc91d82c5479bc73daef1cf7a5ed21a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM3DF2204126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584b26e45cbe6307bb8102ba0b793c16712b6e6eeab6d16843781fbad4062d80. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:47Z), 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/QM3DF2224417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40198081512b2338d903c4e56ad6840dbbced54ad9411b1bc84f59cea1feb0b5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QM3DF2246984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300def5245ebae170978722f10c7b854269096a22aef8db06f8384b4aa8dcc3. 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/FRR642301355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f637f15de01a6fbd6aab621da38e84ecbd2cb239f6a2db4c2ecf9018ea707f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:11:58Z), 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/FRR642301356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522ba0443edf07929bfc0bebd91bba5cd6f67c945109c33826ef44e991a555bc. 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/FRR642301357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aa660a91c3c2a915aa5eeafbbc1d37e7f6257411fb10c50f7081988df04faa. 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/FRR642301358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60268cf4d0c50546ed388e02f277f8df4602bab58f77490df880fe26b3a0bda6. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DGA0Q2487356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe103085094ef42da5c8eb8a4e39eaec6e5e260af8c9484b1b07fff74633e55ce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLT2H2500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac8d48a774a77b3d08960de2366066c563d0bccc6bf58fe4b215ccae02b67b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2155545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911b0ad7dbd9274fd3d304811bfce30d1abe82788fac82b49d3613d59954d292. 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/QM3DF2210183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd86eccece2a7d9e5c6b3d99f6d338027934c44cadf6507d5a4dd2f7238525ef. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM3DF2243307.
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