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 0x2c69335c29cc2147ebca12d10fb533c9383d579bcc47ec5116b197fd34d76921. 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/11eb7352-90ad-424a-b59e-b6cf2bf1120a.json and https://artists.proofprofile.net/proofs/artist/11eb7352-90ad-424a-b59e-b6cf2bf1120a.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 0x4d83fc01349e712b0694abc1f66d442022c210e0bc7892d9d8895c70568159a2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62208908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fcfe98896cce56268188fa41eb237fd69215746714ff50c58d388084e94d17. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:17Z), 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/QMDA62208911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ccdfa7fa1f13451440de37b740b4e50489a35e09b71df1575ab3dc255eb958. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:44:55Z), 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/QMDA62208913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a757da6823bb04cfd620474a8f67f19a8f328e08c7ef2a412fcdc7c407549a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:42Z), 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/QMDA62208915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b630733daeb18546fbce67968dbad47e4e3935a18ff94a29e6c5591f9e0c457. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM7282413260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8d2dd2ea11ba6a56c53fcae1c042bbc5dc7efd62f9fd8068c16abfac9a4bcf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMBZ92467471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917d0268169b2eb9f4adbc9649e161481d35e644be20f5cb6b341fdcf3239d4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62409305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc73cf1298e18d7f52c0fb64b2e8039689d99df1a3ea9094f35a2ae93f639ee. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:02Z), 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/QMDA62409313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e2cb3aef1411d2efa78cfb02fb9f7c1cf6ab445540c6c6597feca2f1bb888. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMDA62409384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa382899ef587e79ee65811949af5dab04c835cc24234e61b8ed987d5891b9ee8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62409389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a13812ce3d877cebfd68eb40251e62ed482ca87a31b0751d29fdf974cd34e8f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA62409403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b59b0531f1abf64e814c6a797b700982bdc2d5dbb7911444b94c4b9c1df397. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6P42583355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea4b3ca8ac5f133d820725e8e5244bc13deac6c18301ab9ced41e0620a677e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA62568024.