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 0xdc8af82e83632c4279d2f8b1893372c207632a7b91c90f3a55bed247cd8261f0. 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/b43d9ecd-8c51-4174-9523-4de96e459081.json and https://artists.proofprofile.net/proofs/artist/b43d9ecd-8c51-4174-9523-4de96e459081.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 0xcc7f38263a7b1e86751cb21c8c09008ea02a2a8d51a9608bea54d77c53b0dadc. 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/USA2P1893572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9837fa661a06edebba59c6592563cf23417203838c2b5380b50ef2e2d3e9624f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1893570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c06cc6f7b25020ab2effa3741eaf6d340c2310d581b424589d8fa127840fa. 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/USA2P1893569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556a9d2055adccd3df23ef213cb7586a0aa7632ad6d037508f71859baf013f53. 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/USA2P1893574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1d806799114bb7e062a0aa146cf7de3a472ce2c8e7b5f3a1ae7610af1483c1. 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/USA2P1893575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde72e2b295571120e3073da560a3f3c0b1ab6d9a0ab6e5e220dc00bde42188. 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/USA2P1893571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259b43a3206d146e11f70b567b21b20fd415ba34d6699e0741d2f3639e986dce. 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/USA2P1893576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123213e4fc566296e6ebe35ab0ea5cb573126b47fadcdfc6529d406174f9ce7. 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/USA2P1893577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26a5ac21359af00bc9466fc4f87661125cc401d97d47c91359d8098dff8b3b0. 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/USA2P1893578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a41c4bfe37fa1efd68fd21b1075a79d46fac089d80c0a46020dc6c9b0f1dfb8. 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/USA2P1893573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d1f0f6a90ca05a7aaff748f6a1845c3be2ebb46765a68b4e71c84484ee848f. 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/USDY41604220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f553d0a8c81d02ce9634a12a5cb58d079eaa4c83c633f6fa3a82a34919e612. 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/USDY41604221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3157b44bb487419367139940bc27b85db5eb96f8c78d865d9879c22082e958ff. 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/USDY41604222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24652bb984b1ce6c2824824b8305cfcfdf84074ae0fca89d193eb5e3ad5002f6. 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/USDY41604223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ae87ea9ce7b9a89c48a3f567f9e0485419594b72a1ac99e87719f9c120b135. 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/USDY41604224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a10a52adb651100d7d1ac3c2ae9500024c92575bcb955ea92e411838587eec. 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/USDY41604225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51903f8b0ebde67162a88f282f90b750de425a1c5c007d8fb911ec9cb51eb28e. 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/USDY41604226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834598729cb2099d88c2b36fd4b8da5d5282cc80cb68752e139055cb6789bccb. 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/USDY41604227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dee2417b27a665a6f17cb1f85031ae04b15ce1e0ba7cde0fe93f476d74c26c. 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/USDY41604228.