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 0xc59c9551aaf4bbf244f8536a9b2aac53c60c0bba2a7beb8d9847e7228f059fa0. 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/2c9e5300-c875-4332-82eb-44710f161ac3.json and https://artists.proofprofile.net/proofs/artist/2c9e5300-c875-4332-82eb-44710f161ac3.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 0x79fcbd8689ba94fc68754cd913335428e16348b84c1443cdb2d28d371b3342b5. 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/GB8KE2057387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e892d5801cdd827eab850e6b2039abf31777626fac6fc199974ac968c3819. 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/GB8KE2057388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e98d2358b7cc7a142ac30c354bb2cb64241bf9320603dd265e9fa8e08db240. 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/GB8KE1952921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df317f169706307e0f25e076843547bae706e2af47b90be11865376ee283957. 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/GB8KE1958478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76d8642808b065bf232249f6098985acd69fbd36cd1e48543b61e421eecb7b3. 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/GB8KE2427005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb3ed8eb33a0cddbb010e2d61b714139ed4af300b5e9aabca9870c246db1d1b. 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/GB8KE2426780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6764afdf3f51ef4f8762232c8a423b8ea7d5fa5362b2578bda29371d4910ccba. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE2426781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70546774ab70fb129f8c1d3703f7d6c532bc0d17be238ab60fc23124d5d8f0ed. 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/GB8KE2424543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f1b4ea182b13ea216ba87d44ff96eef095fcdd59762d5b0e5428833f23a4f. 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/GB8KE2424489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490e88aefdc09835d67b782ece7726aee9121f0e65bab3af3d1ee0a3b9b65829. 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/GB8KE2424548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a736e784b289fa9c4ce44de8b18955c3dd16d14e16d1969b40db1dfdf379f0. 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/GB8KE2420264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8608d4fa8fb75c36d23432940e103f27bc3094d56626c007d0db810b458415d. 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/GB8KE2420265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfa0bd9c95bb366491f4435f0280fd5d178f33c313494ea5aa4228b3d4c91e2. 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/GB8KE2420266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502c6da4850fb490bd378be150541366e3c86807c41cff0895d6c3ff920b9882. 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/GB8KE2420267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02cd2b040725d58534456bedd5200c590f75a979df362ff36af477b057efe23. 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/GB8KE2413560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346e193b9dec4ebb94893cc2cc5710001190644911a278405046c791184f06ae. 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/GB8KE2413561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a5c62cff766680593af5667178027bb60086c06d30c92afd62246d1788365. 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/GB8KE2409594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8c37b1da416e5c0bfe74d5af0acd21d36a12f02d420d3be052b42b8d2de94. 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/GB8KE2309964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b121ffc6bbf3de358d458a4cc8ceb3e35fe321e0e9039b005efad4754d54b58. 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/GB8KE1858883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e10a65bfa107c64c50459786932919b676e9970e32dcb6fe2cd2a187e691e2. 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/GB8KE1759055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8081e58ca6ef3e70cfb951d5c22d760c2dba6e483d3e0f0c549bbe5aea8c8651. 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/QMVRF1200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648070135631ed3e7e93311725ba97943c868f11297c75565b6491f7c4f7964a. 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/NLCK42224879.