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 0x792898fa381c7533656628838207f956dfada42bda1124c82ade696e013b30d0. 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/5b567dca-ac48-4f7a-b068-ffa050abd21f.json and https://artists.proofprofile.net/proofs/artist/5b567dca-ac48-4f7a-b068-ffa050abd21f.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 0x7912e9fc26af611064849a47f5af04b889af90df107d622093093daf54241b99. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ8R71700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee1732fe386385d1c663f0e9677584cccd413c8d8420227a9f0a06a5ff99e73. 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/QZ8R71700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28bf738960fa3c789a7ca7e9aa6634b56470bade3c06433768c06da207f1734. 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/QZ8R71700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853aa370002014a19bda4c3f677733c43c2ae26258c9fedf6a1a61239a8bdd80. 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/QZ8R71700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30a9a26e5da6a9055f4952bd44ce39cc083e8f64513735c81b6fe5706234e52. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZ8R71700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90811aacb13fe3206bab6e18ecb3144dfaa7e352ae85cec210bd025b5d2bc0f2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:21:04Z), 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/QZ8R71700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccecedce1136cef1d11ae61eb1fac167950c024d812a1c2b3e7b9556e986451. 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/QZ8R71700136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942351a73b70814af80341e8cbaa15f05fede748abc6bc4ba572c5183dd4ab72. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZK6N2030910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac2a04af389a25cfa98aacc7a8c031608768af60906e5c8d68f3d9569b2b26d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZK6H2069849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd328c11f371ff5c8c688a92f2507aa8bf703ea8888f97bec23655653bfb8d437. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN62106071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0380c4cd6e0ce796e3078dc840eb703d6554142b1bfddd1b824bd5d23d50de8d. 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/QZ8R71700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b76a005a14d237d0e6fa2fe3fae7db5808578635c7bdf029575010a5e64750. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:48Z), 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/QZFZ72160729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd538ea1f888026d9b62749990f63bfbd4f6b56a6627f00ae12e6a73b445c789a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN32103339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8ff9a07ac482ae2cb710a5dd8c3de866dba0d88fbc1305ffe68744dd99492f. 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/QZ8R71700510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198b3c43504d97acdb05a48f7116155d95e633c248c57d98b4bdbb5c5867712. 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/QZ8R71700872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bd12414922a8471751bf87c09b3c7b221c6bc1afcd46b5e82f5c7cdf575018. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:20:39Z), 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/QZ8R71700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca1ece57ae23bc3df1c34c79b4320d4cda50a1b5991f86270d6a48c4f008162. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZXUG2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152ea9bf9ff9b8f5baaa7ddc2e8fd1c46d8f1634dff68078dd4e1ce914b6411. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:54Z), 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/QZXUG2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6c2e3772da82bbc3149b385463472fd7eff91aa4f9a599cde734d9b3107694. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZXUG2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678fc9a83b2f02f7b40819cf5057c6f30a017115b365a537fa3b191c2e84fbc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZ8R71700527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92663848787c65ae2ad2134bd168d75aa1c3cc1b3b89e494498a5256026923. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:48Z), 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/QZ8R71700528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c557b609fd4927325d1c867bb87862b45dc8301c0aa0e66b49abc6ef40749a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ8R71700203.