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 0x4752522a3882f0132a51f200cb14e63494122ec991c69ec9e585e9ad2c6f166b. 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/3e8c5c73-99fe-4cb7-a1ce-bbc0b9a66724.json and https://artists.proofprofile.net/proofs/artist/3e8c5c73-99fe-4cb7-a1ce-bbc0b9a66724.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 0x90ccc718f01e78330fa0277cd170180fa62947acb88e132dd556a2d8eaf302b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7281544808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a47b5c26944520d18c60a551ff296a98329db9b05bcec65b1e1fc435dd5164. 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/QM7281544809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9140bde6479c15093492a4edcd001b0617dea581d6cd72dbe3c948e6ae254bb1. 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/QM7281544810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a182b769485da10c8072b28b517d1aadff72b3769693314bfa50654ff5b5f. 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/QM7281544811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e29548df05886cbaa8e0bf4d795ec30bde1f28ba8d2478bc5b7c63bdeaf290. 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/QM7281544815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dde30fb96e6b8e2894408a0e745e564c6a01c23cf9c5b298159fd0741f1bdb7. 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/QM7281544816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1164d07f556074a94c52e008776a4e65f54aaaf6fda7ec3be5054ed8d0b2bc5a. 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/QM7281544819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3721248ffbaee72159ecd35b0c171f45732dba1c10a763bf6f0428e4182432. 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/QM7281544821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f6e72a01408c702f9116bdaeacac3e9be356be1a755c412c7551a8c8dc5a7f. 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/QM7281544824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d05f6b23e2ab64fe2e1d66908b3b032238235f04e995739135e6638e7bfff. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM7281544825.
El Mar y la Esperanza Con Sentimiento Norteño
Época de Oro de la Música Norteña: Mujer Paseada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93d91c161978524df737f5d971c2c8eb6331e2d510d68a47cfc24f76ab3d3b. 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/FRX991528978.
Amor para las Madres (Raices Mexicanas Vol. 6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f8b7bb025fb9daba295cd59aa9a8ed049f0a3840da69b2a1b43bb054ba71b. 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/USJTQ0904289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155362d3940be013988d05f35cc98269bba092a7f008dfc7dccf47b78568c3db. 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/QM7281544786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dff0d81f987beb7fd19e15c460e95dda0bd9e90221a27d3f5e188160e5db37. 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/QM7281544791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a47c0d00271dc91513cae6c0ca3ac9c59826f33b4b7b6955bb9212a6d7332. 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/QM7281544770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270f360f1d5cd68772e7df96b5db70e03ad18f08634782ff4fcc7ddc8bf5647b. 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/QM7281544772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2977e7b2e758a1e8ede0c9034bcc975ecb6c2ea942573b349e18527ca088c62. 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/QM7281544773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf695a3fe871a2fec0d8d3fd27f9b6061aa2f55f5179eeed11b7e0dc503b0199. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:23Z), 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/QM7281544775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069e8a4831d4b4ee32807af6767e7b9979297bd3b7319f9c2bfbd385eca8bed. 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/QM7281544776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ba0e6941840d1859a4379271346122d6950237c9b6fa49152a86d170ecfeaa. 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/QM7281544777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b7545ae6930114a5ddb2591b4f16e06b9147995d73b77a0087a7ae21f89af0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM7281544778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ba58f4fa4e62607910e4e51b88d7cd2aa671854325d35666d0336dea12d0a. 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/USCSG0505401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd39cc0397778a65e2d034de7be07c2e8ac48ff8e751d49cb488649761668b7. 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/QM4TX2423083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481f4c068fc243b5716f4f2146c11efe02de3d8ec18d5ea458686f9926176d02. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2423084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4ce029880cf738799a9fad5d853d053074d50f865f10feb6f2ce7d3b103df1. 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/QM4TX2423085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26016628757b52fda84fbdf09088d94c9deb607eda122aa7e029ddf65390a91b. 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/QM4TX2423087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f181e0acdea4d3385a2eca4aed9eb7e78a3f079d5d6dc1c7e3bc33249a9b80. 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/QM4TX2423089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e16e1aaf0176bd305c43a5809b3638b11ebb30bbc4e220186c700e5b8a06c1d. 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/QM4TX2423091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4084cf742d6f9b4d0b9119a40432fb02293adf6fc71717db3dceaa123b202b. 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/QM4TX2423092.