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 0xef14c8da6e0ef4ec38b92ab0d7447322b3839dadd5553ddc19402596fb2746b7. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bebe6a0-ab73-4945-b86b-75f8921209b0.json and https://artists.proofprofile.net/proofs/artist/7bebe6a0-ab73-4945-b86b-75f8921209b0.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 0xa8ec4bc5f36b9ddab1ac09e3d5a65fbcdd42f842b3bcc333a45121f9c580fbe7. 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/BXHBP1901012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14165170203ac4a5a0c090898838ee4157521482bbbc4ecc0c6a598e4f8f1955. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXHBP1901013.
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 0xaec203e79d1783a4efd1b0417daed45714480b59faf194389de2c1122af91b5a. 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/USLZJ2009486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709350b09b25b0f72a7ebd367a3850bc8cb171b1e2405cfb25527a3eabcdc2da. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USLZJ2009493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296a9a4721ca6fe181d76c65664269132dd4cb87044bdf39657e230469cdd1c. 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/USLZJ2009496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd43abc08856de5694979b48c1ed5e0be85b00b4cc9a404373ea7053f6e0265. 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/USLZJ2009500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01fd3a99d23c4b8cf0d07eb460fdcd7a5c70013a1dde264897deb4e53337521. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLZJ2009511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c317b6d391c75c225da695c6ad3b6cd13b6f4b2b5a2eb23060d68126025d280. 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/USLZJ2009525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7461448e373aeaaac0639e957d8b6aa32d22f01bb18ac95616c64c272bdd57d. 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/GBKQU1990403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f5ab1858268f14885a1de3178c0875af1bc2792c1cfd35f1de9e1cca0144ea. 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/GBKQU1990405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cacb71541a8936148fe286d718cf8679d313aa70a1f23a5a096f8b95452896b. 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/GBKQU1990406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b5b6a8de7c42e12a0b453b132a0a0954715ae1f9171f1d971fe74202ec131e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU1990408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7beb12a988167321127ebf3bd490c75e4a9ed87837eee1f44e9988e0b89be5e. 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/GBKQU1990409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652f0215f4bfe8dd4d46ba83987afd28f1a938bee347caa7daf9d954ae4ba844. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU1990410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5339de1bdaa149857480bee7b45d844e8dd2d63d9b8724921fba4a422de8fd34. 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/GBKQU1990411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071aab0c189b0a4008a1ddb7203600af5d0b67461ab5410db90190387766650. 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/GBKQU1990412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736a09099400e1a9ca132650ffcf2a723d235590ea44718cb51f6af836fb421. 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/BXHBP1900531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd7bcc6356729e57490a28b24d6a4692b0454a34b576added2b9fcda3fa705. 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/BXHBP1900373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d27c5cef7f08b267d57b29b32f170e6b04c98f73e89f55039e7ab906296cbb7. 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/GBLV62031020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc62bfba81d8fbfac4db127046ac32922728be6fcfb1623107993771d9367a2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742229412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b0eaa93e357d4925745e4562523cde6119e6894b63fc791eee7ee235b4688. 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/QZMZ92201057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763659b1649ca2a1e56ae08c808edeaaed1031fe13812348a0bf1865619c1e18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX7P22000042.