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 0x3d87d168fa3684cf008d6ba5e67477249e64f8cb90e8a58fb39ea9def37fd765. 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/1b4e4c94-d116-4a15-9308-4f85b0df1ab7.json and https://artists.proofprofile.net/proofs/artist/1b4e4c94-d116-4a15-9308-4f85b0df1ab7.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 0xcb02527afcfe512fe8474f46a50a0094a441c6163114bdf2bb24c222ce50d8fb. 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/QZFZ72232500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af490df6d8acd37656679c9238d0bde5350ae0e8aee6f4a852595c50381ab96. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTAY2239978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33193269d189b4f8df02fd5a309927bbcc8de4beef9d11c6982b12496b7a543. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBA2225667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ed8536fbe8e70d3c2d1ec2d86c5027f570d7a78a900a215d77db426ced9ee0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:36:55Z), 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/QZFYY2381078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4699afddc0f90835b9dcf090778c651774d70507e059d0e29e2c600bd6efe. 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/USLD91748253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a106bceaa192a7c0d588647e551f8a226dd243ef7e913f823b51a180cda7296. 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/USLD91748255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837424cd44f2b643e5680f03cf22e1d37c1adc12dab4b85e958c05ee4b2c33d7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:23Z), 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/USLD91748256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe996080b3cc32063e392504377429bdf5b1406e98b0d2894185b0ed63b55209f. 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/USLD91748258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca9f44bdcff5e02ec75b59596e13896a124a07316b9547b310cdf0acad7627d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91749200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d2ad9a39e83cab52eca8d779f88225e7b395218c2a076126140b2d7eecaedd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USLD91749202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5a23af177c44daf732b4f28db6296d475bf1ab55b073d0356e825f948c2aae. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USLD91749204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e6afaf9dec4d672a3c64bb8f3b70a65e58a787d36ef9812d281c1937cd471. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6M2416242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63daeece1c24908f74c70a9f8207e04231cd548c3819a8448e67af36cc1e7161. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPEW2442614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31211484e23e09dac5b334648e4c8491c273056ae56c14bd2db9d06738f8fdcf. 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/QZNWU2484481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbf65d7cc7acb59dee00a2f9b026f842e14be6788da6cbb5c7d8d3119e7b15d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTAU2476945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5756d9e7416e39a82c24cb6d589a5dc8187fe27ae9abae61ebbfc415e3d01. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB82403516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abc4c40846e19b8bfcd477f7edfc29b9ae3ce137aa877537851321bd38abf6e. 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/QZZ792468610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1dd4ea8ad16c4c896012661472aedd345a9428893a1aefbe9a7c2f266c9c63. 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/QZDA72537760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d10ea5fcf06b295b7b7891f4f0df116366303bb90f5a689624e579159240ad. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES72525703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58394c7c4df4d760ca88ab04e0a6abdee333c9b59f91674cd92cadfde283e4d0. 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/QZHN32540254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7b42bc719ea8e86f1cf741f3719656276447be0514ce77449726ad233219f3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN62584209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb043578b732af4f5976a2225abdb0e509b7bd7badbd9b95717664070bc33dd3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN62584210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f7d4bd91693f4f90dd9270df3f71a219daae5b2590c6c860417c907c9e934a. 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/QT6EF2500304.