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 0x1176e11a990bc134fa3f840f45fd4b766c019b4ae42f0972ac1c114e8e85c0a7. 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/f54f4745-022e-47dc-aa7f-64f54b4b1d3d.json and https://artists.proofprofile.net/proofs/artist/f54f4745-022e-47dc-aa7f-64f54b4b1d3d.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 0x240a469b5b7fb797e39d3feec59e6c01bf71d33074ae210a7c93766af6ee948b. 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/US3DF1952473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea16039d016811ca1ab848ec67a4e3099e2cacd22c09ecf6e1db69ecc227407c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US3DF1952475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcf73bb7296bc6e3f30becd3926e5ec3650ee8fa06d78907ab4d75fd9ec6155. 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/US3DF1952477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607e7a410af3122a852b30c31f8c13fbb840133b5f50ff3e7a23210e1b7fee2c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US3DF1952480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e419341b36f9bb4bf0d9ef37e8faf77bc750c6e7dc7c19a71471218568770a8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US3DF1952483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e72509c0b423080dd043c4f78de5a38015868135f491e3a595c522ecee0ed9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US3DF1952500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9122309eb276f8ba32320d98a7c0d4dad6799e460c27038ad1537588cf23d8. 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/US3DF1952501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1c8c7521bf48176eeae26f1e82a4c0e5dc1fb1aff9f37dba3941dba70b551. 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/US3DF1952504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4128cb78c6b4e4f9929d1d3f969b4cdae15bbcb45d5987c84af8aa6f9b27d979. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US3DF1952505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0512e126c97c3cffc5fddcfcbadf7eb8c90ded8572bf04d36c9931ae35e8ef14. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/US3DF1952506.
Gira 2007 (Desde la Cuidad de Guatemala En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03296a00ea607e5f64a0bff1366074f4669f035a57adf6ac75d811dc0d7d7f52. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USX9P1245191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbf83b30fc1247be9bbb747d6faebd41e93e9e95ea4414a00ead3e709a3b3e9. 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/USX9P1245192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d423e3a0ac0c5eb4724ab6a725a5021e28bc1bcf94ee7111c41867a6b3ecab2. 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/USX9P1241597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14c4c6896f438f590475ccf432d937fe308b243ce192eaa1e01e39bf1395816. 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/USX9P1241599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29b21ab7d8a576af2e78370bc6f35c6ea650a65b59a6d2c4aba0d3c0cefc332. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USX9P1241600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc546abdf4a6c5e013b16c27af2c37ee1af90dbc1e09652d87463ed7fc4529101. 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/USX9P1241603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe354c9bafdeb3e85917e279afaff9229e52445db4562c7f7593af7103b541d34. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM91364276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f71882ce1cff68234421e79e033505641335b5ac6e6f0f2c5f595ace2a5c2d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USHM91364277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f22f4bd48e719df3e89ef4cbdd047f8bdc5cffa6e92c2c410d87c0669d5007. 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/USHM91364280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba31e475d0abb3385db3b69fdefdda7045ea5d013f6f1f404af82c6ee93731c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USHM91364281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da52ca0b59d00cc3970b6a52d8b440c584aec9a383b59e4990fb72920041bd. 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/USHM91364282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84fe86f2fbf6d2dd08e48fe133c3f2b5b0938659ebbf6203065959a874f8881. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USCGJ1690796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9d60f9d71a314a0658909e443988257d675245bdf5ec6e7b1c33a7ba0deb1d. 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/USCGJ1690797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d3830b06330c240475ce410774b12ffe7aaf3313bd52f3517c97e2f497f4c0. 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/USCGJ1690798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b05e213eb3e369fd6d4c4f3b470e469c90de03d810c127a9a359784a791e88. 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/USCGJ1690799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e17d2a50453f5705cecb0315ee600ece7bd4d2d80350363c36c9c94c28cde8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USCGJ1690800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63209b0f6ea42beb481dd6a7500949e29411a6b1078475a35bd4c5272b4a5e13. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USCGJ1690802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb753ba7cd0ce06f8089d4f5b90301e64f29bc67ca29317971d5a90ae02bd955f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USX9P2009825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0945ad83ee315479cf2495c8252af681989de7ddc8d15a829bc8380d9dfe7c. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USX9P2009831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af825f7995a45a77bc40b496658509f83d2040de9447341b31bbb3bad420872. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USL4R2157697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf7921a5d11fd8e7acb2ad08ba36281b67546ee21f497c5b76937602cc1a33c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USX9P2488637.