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 0xea70af7a482fb2b82a0cdeabbecf370ea17fc1b262496e4a2a23ef8acd4a8840. 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/a2694b09-93be-411d-bbd0-bc9ee2f68123.json and https://artists.proofprofile.net/proofs/artist/a2694b09-93be-411d-bbd0-bc9ee2f68123.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 0x2169fb14c0da19301aae01a7512e34db3d5b27fa42fbba97dff7faeb3ce68a7e. 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/QM8DG1883734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3367aa11e9f18435363c3be62d14bd770671ae3244e37bb7296a7735aca3f426. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM8DG1883737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6aa81b7701042230e6606f61a4f8f70d981b30b741584f9d2c8e313b00b24f. 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/QM8DG1883733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59579d7814704426d2e5bede03aa8d533ba2c0684d4588d8a519270744721ea1. 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/QM8DG1883732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721329a99dea97506cf183a15cb0e240939108bdbbcc3abb4a9f55d5679a9ae. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM8DG1883731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff975270b79adcd96becd2e9420c20e2c0c56da84e32735b8bb2942532c0b7c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM8DG1883728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5aff53ce049b3a8f8ec49e4c47ff956c014fbaaa391bcf25ce7daf6e92231a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM8DG1883726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5690ef0921b1272d45b6b5361e9492e21a141e6d399078bfd3bd12fefe9c88bd. 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/QM8DG1883722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e73b56b504ff0c5853953375f3d663c33c90670e35fe5dc8797623c1441808e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM8DG1883720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d542e982e4c3294bd22e8cb6b677c3f7cb692aaa2e2769768104bfd9ebc0f7. 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/QM8DG1883719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfdb5dafbd9456aeda541c7006aba630d66ba3d06880bf162c9958e12f3769e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM8DG2043760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2aafb0311ecc71897a49e0e25ec9385f1b5e826d193e06d1aa60bab031904e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:52Z), 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/QM8DG2043769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ae4f4b0e657dba5efc032d9520bd17935c4c70697ac57d1fbfa88ec8927e07. 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/QZES51854473.