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 0xd60fb4dabaf6a7c48e1f268d324f2dab9b2acf56b2ff7349d89a4bca9c880281. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35ec0888-e82f-4b7f-9689-00aa43983239.json and https://artists.proofprofile.net/proofs/artist/35ec0888-e82f-4b7f-9689-00aa43983239.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 0xe0f676be8051653e83ba2e06d5579977e188e723622843f9ec8e5795b3e4fa83. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBSMU8703044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489afdc77e9b50754e8e26db1fed03667b1a1fe85de2c71965a1e98dbe35a052. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GBSMU8703045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99af60f7136d7052bb0feeb8c9238ca8c36c2f15b95f9756e8382178d14dc4c. 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/GBSMU8703046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe555823ea776935c7e55920ab2feb7a94e121bf4ea70ecc481a17674313e925d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBSMU8703047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33340f965e8d5946c4c2b090b8e059a45e4066d01f0201faa27cd4cce051512. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBSMU8703048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727d23dd9b1a76b7867f2cf4b8208e8148636e4d8d86a5e558cc4d7b397a3b31. 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/GBSMU8703050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3364ccaa54ef0415b62b04e8ec8a7d0249e6d7201aad8b8d7ef9d18fdf8d48cc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBSMU8703051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d987a09dcc5a7aecaebd0c75b64e8a266f62807273455a4abe09f0af60e0ad. 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/GBSMU8703052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeef95fec940bb1366025b4f87ab6d515829f60ef3484d37403b19bbc7ceb7e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBSMU8703053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615832bea1a9d01b0e2fbfed156c8ac418ed955b96f7da624411eb263a0bb581. 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/GBSMU8703054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec84ac33d63c354f759064a09002cd249859d6051e5d4fd35e6b89df1040b91c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GBSMU8703055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd4e5e47cfb61e712896f2de1aeaf048cc9f7bc9bdd1ceca4cd6ff3131f2ce6. 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/GX4R52259958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f04f438c6f129130d74207d723a7b1a1d824b8a1a23cceb296d4491b7b835. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX4R52259969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ade3fa514a3dc36cf3920d5e3a2b772b9d7cf56cd8f052d8bf520e44f94f65. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX4R52259972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69990e35ebcb3e9c37b70744f35d7cb01a7816e6e7602f8ed8910e99a82ccd83. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GX4R52259973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1b851d5684d6e5380145a184aab58970186ca274d2f68be1a9696ffb74b507. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GX4R52259974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dfd7503247d868855f878fa7efb616e9b14ea40450d44926c61bcbd800c628. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX4R52259976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8c76f87f9324b970134563ba97ce4f962a494e99a68e5e8bf581a3ae88bd61. 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/GX89G2336788.