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 0xe93c79ded6b458ad12ebb585aa255872911e74ea7caef083dbcde51cd87e50b8. 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/4adc2108-31ec-46dc-993a-99fea26d775e.json and https://artists.proofprofile.net/proofs/artist/4adc2108-31ec-46dc-993a-99fea26d775e.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 0xb0de0386e6e03c0a84eafc98b142714e9c5cbbc32d9773aec2e474a4665bb5da. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USQY51075142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4809edb97b979c8c2118937c1b21bbaefc40eba18eb0256fd68b2933b67a8598. 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/USQY51075144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13727b3a373a0def84cbde46be6c06eb0954d8ede87d0b1cc6cbe9fe62bd444. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USQY51075146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abde738fc5009a09cc529fc4ad9ad889826d546798f57e494e10c60b24e76a9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USQY51075147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb90cee5bdd3f02f296d1ec06e6f961500ce6973b01e5ed10853b67a777aaca. 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/USQY51075148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ee8bc5b0de1f300ed52ea975a170cda305d6b8e3022cc5ab1239ebbccd2085. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USQY51075150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23f069a26dd7fd4dd8f04b4a0add799c5660e638a3ce7be0305e8f4a81fc7c1. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USQY51075152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408da68151d9718f4bfa2b0e8657853345f984d7c54a28705679ce1658ad64c1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:34Z), 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/TCABC1143185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27de5916a099bfaef7556a731ed262ef9929262a33cd6db257f76a04d8a5d4d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCABC1143186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bbda5074a2b01ab8e3b7a43e043e744b73fde22e9493a54a4a9a990b255cda. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:04Z), 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/TCABC1143189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087b32c63f08f319a53cca0652a199740f259748267645c99ebe2e2ba488dc1f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:33Z), 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/TCABC1143190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a7e9ce4d3a797a7dd78e35943d6b5a2404ed2d0ba3145b2f391d58abc1cdeb. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCABC1143191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a7725b9619400cbf6e516cb6838f952c584536f7b7156ceb22818b2b2c3cd6. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCABC1143194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa656394003b6f210e38d82300229edc293e5e989face70074cfe74d848b7e40. 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/TCABC1143196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96726d1bd2bd5648e6380d58ac5ad0b765832775d28f2f2e30958be9328c5533. 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/TCABC1143198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9345e9a0b09bf364167617de290dcbe874c3ec384f0ca01cba512a8c80e1a8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QML961200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd610d14875d38f69532a63468fbc3168332cd6cedf4bcaf1ab0ee0c01e361ca3. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:36Z), 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/QML961200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5edcabc8844d5d360be48950f9d3e8d7fd7f06c9d16ae92851fa809a64c2c4d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:48Z), 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/QML961200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a380519e9a1b66b9ff7972ffb17ec66a5f3be7a7cad2163065b8125f9e6539. 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/QML961200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ab0a0b808ac6a65be2daa0e65dd2355977548c9cffca33c78ec37d7c12c0c9. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QML961200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac87b7d9228050bda672fe932b9a7e5c46dd09b8ae2af2469bb19db3f4e3f1c. 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/QM24S2010910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d875733b87e46bcf2d3d282a4e1a1e5f2e87f70832c3534ad3369326d3ec61. 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/QM24S2010912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef551fcd1543bc65f44aff8abfaa336a080d5e57817777ac6d21394a5fee08d. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:27Z), 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/QM24S2102975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ed8f9a110db375bded0a69ff6a3756d611ccd064a9a53257ba276cef827343. 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/QZK6Q2113081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f07f6e716357bd96258326230f6da0082f2ada96b939ccb45bc92b3f8fadee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6K2142016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81938487937c205c6001457c12d84e3287605e22977bdfafefcd61518c4b5286. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZRP52145971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f23f68d455a187235a932c76abfee38fc98e761ba13f4f0ff15ceca99a8fb6. 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/QZFYY2246203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b9e455467c14431f1fbc553050e4ef3086d606a5a8b73e56428c64e598cf3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ32266167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0403e5887fc0122d0e10752e7327e94802b8c6f2a50209a48830800068af8. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFZ72268622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259485c83df76574e6d1a4ac1058d406fac553360e0d3544e5ad3591ff587db. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:28:20Z), 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/QZES82262311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb77ef7ce5f89e398e6bba5c1f323ee95fe4d7c8cd15336645740f7e40349e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:44Z), 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/QZHN52207342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7e0a44c997ff2ced2c0bb5ac7552cab4c17905bb259986979cc0250ff6db1. 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/QML962200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadefc79ecb2dea2e93d646e8401c3544cd03a92c142a2e7c488051c4e4509351. 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/QML962200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a31edf5b36e66f6627e57616a934c43138fcc3a607b076183a135d2299bb55f. 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/QZTB42226157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa792b7befdab1274e12af77c10fd88d64033d65b1a9efd354df602ec2554f825. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:54:20Z), 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/QML962400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1543873e71dbdbde6e16b23b66e230d4376c5728c7e8f36f55005434d8f6b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QML962400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4d7495f0679828095c9020422f8aa2c360ea7023aa35dd7a62ee630b70e061. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QML962500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74bc0c81c668c11a1901e323911841ccc51646191b6417f41701203af72911c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QML962500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bab2d438f28f04233341c4a8eeb06e525a2ad1ce508b54428cfe0b681b710d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USC4R1021572.