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 0xc8baef7dbf35af997bc6a544535174f343f25dbf9e554ca695b8df8ef368c337. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ace542a-5985-43d5-935e-927df6fae8fe.json and https://artists.proofprofile.net/proofs/artist/5ace542a-5985-43d5-935e-927df6fae8fe.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 0xdced6f6d6540daac052a5b04ccf534636291e540961a008c00d3424793567136. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAW2211749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776b6d6bdf52ee61a966e759207624b6ed717f88a96fce0d0e14c8b0743c0f06. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA052446253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba523e0a1ff6fd1ed27ddd53c74c8980eae89e86772c0f181ee1d1640f540db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA052446254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ab81f4458815d2943c92b83397e02a7f52ba46c302c5ba4ab5f4484ae1e24. 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/DGA052446255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edf0f9f73178450da45e74a24775abe04dc2964b8947ee221fe97522011ea2b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA052446256.
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 0xa16e936e4654341cfd9854064e80e90f9f4624d5e91241bec3ac5a7a56a09de8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX452390745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c64615e187faf89f43f7f7e2dcd4e2064d4748bc004ea74a4255e3f0db0826c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX452390746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867bfbaaa724bead53778463c7846c7b3325ff99b82ffb7ea4dc707b9092dc8a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX452390744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2dc0db1ec3ca790178f290229126f8ae7a7981b24c351bf608ad6ea529a384. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2127525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765781a84f7604817ec7dc1ce7d2134c158ee41b363f763e975d91c418bb761b. 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/QZHNA2127528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86b29df43eef1a227b30ca920c663e4ee0b508d421c3c6b73de4c867e3527e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2127529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7a09fe19e95895a5970db1ea20b76bf0d6c6dab6220965fc8dc0f3ea0d048. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNA2127530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b8426746610fd30d472919351b35040d10f06d0e09b0880c87d8cbbcd2ffa2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2127531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51a10ae7e3c4fc73fae7609ff56a6a6a848a660e58ac95627d7bd8f5f34282f. 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/QZHNA2127524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f11debfb0dc4d16409aa010bf9abf21a2e4b86455b234f6b9c573bf43189fa. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHNA2127522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63efc69146f55556607fb80e1231e1692ccd8d1ca1c9eae8d67560d1afb91068. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZHNA2127523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b81f9b1d6868ecfa3e9b3524a5a97b73d129768a8087bf171e11db9d677aa4e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHNA2127527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6041329920d98f10e7613f6ac832769505b1a0fe3f69eebef8ef97e53cac811f. 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/QZNWU2061177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc244a7e3d355d8f436bc5f67de0c96214b95b7c5f941b12b93dc9cdc4e24ae59. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWQ2034146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc806f0f909e0bbb24c169e713c428f70767b635b7ff52c9dd9b263491bb606ce. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNC2023717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a716509566d6602ad3e5ee43be287a93a03abf9cfe9c4c79c6de77af9d07916. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ4JJ1941307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8931cbeeadb7afd20dba55359d3d79e34b2ecbe2b89d712e4faeb2100467f0a2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES51878088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16bf6149160a0764cc796e1b7ce55a6d8bb32204ff79e531294e0b2724120d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5BU1714984.