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 0xe31266cb1a640b503822bee88a7e4022059f999ef33064e6d0b400e75a5223df. 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/ec883bba-af9f-4a82-8aae-3cfaf07d371e.json and https://artists.proofprofile.net/proofs/artist/ec883bba-af9f-4a82-8aae-3cfaf07d371e.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 0xd36b698e58cdadc174197b43a709514457e76f4df6e2d297735baba3a9165a54. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA2524161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fa9d7d61746f4c98f748c914e7f923995341af6d8321fa524c6afc76bb4915. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:20Z), 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/QZHNA2524164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c72d5487a6c522d4ec5498c81b5aa62c648dfd43ddfefe2ef43fd9db9650b6. 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/QZHNA2524168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2259a5420dfd9ab60faeaddb0e4096b74cc12701fce14ad1f4a05e5e190bd67. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNA2524169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a7bf4de628b4544deab5918c85fc9e0c0399f2bf47003d141620cc2d4f9562. 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/QZHNA2524170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5aaa80a4cdc48f7c4d3d782b9f62198cc21d0bd66b36a50ec5ac460b4c6502. 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/QZHNA2524171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4037585162eb15124246ff2b964da4f1e5089462e2dbb116b805ef405964b5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:15Z), 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/QZHNA2524173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77adea6437070e51a38deaf7ecc044349b7d1694adb9e1439993ab137db88020. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:04Z), 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/QZHNA2524174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab625a9ef612ea355271ef9a5407f0debba499179f2720fc982d997a7f5bfd5e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNA2524175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d2ca07289f7ad32c07e8b2abde9419e0e6d905a78e1fa6aa9f9e0116eba96. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:28:04Z), 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/QZK6Q2531847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cddb2a365ab92342c520e5b5e238b53c1eceb957141aa178ad296380a5317b. 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/QZK6Q2531850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b92507308a57f82923570cfea1c1e5129d409993e145ba2b65f7fa47a22b71. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:09:04Z), 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/QZK6Q2531852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565daf8dbb3a32112cd876977f28c6cd37ad08a97ac9dcd7bcba165ce0b2392d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:50:24Z), 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/QZK6Q2531854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eed87cae44122ee70cfda4609f24735374c9bdf83ccebcf81fa3690f7b95fe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2531855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27845f0cf81c6775696bdfde723476cc3c39f43f877554f49d843adbcd2662d4. 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/QZK6Q2531856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe443e1d609275ef7e6e1d7c62d5b2e9e5cf71e608bbab1ed98f0b6cb5c30e9d4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:32:22Z), 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/QZK6Q2531857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f65fa52bce855aa3463650fa41727b46205ab1e5f296149c44cfe89f42fe402. 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/QZK6Q2531858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd724ed09b53dbe2da9ca1324e1f30e3ffbf1a64bf3cde71d6c6a482b4b4ff33c. 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/QZK6Q2531860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5073c9e10fdfa0453860be7848e25f79b32b98d3a2a1746e84d050b3fe13de6d. 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/QZK6Q2531863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950176472c4395bd46a22490611bb49c68d2ceabcbac30ccb4a3e1bbf9176e36. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:39Z), 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/QZK6Q2531864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6082a6372714ef1fa3a2828d44b3d51fb2e82c7f9c274e8fe94baec981c8f9. 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/QZZ7V2567529.