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 0x3abae5d605382d00f608087cc697162f844bcc255000d0801c147d1eaf07fa88. 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/4cf6120c-e276-4d7a-93f6-af73ac948039.json and https://artists.proofprofile.net/proofs/artist/4cf6120c-e276-4d7a-93f6-af73ac948039.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 0xbd96829d3dfc6629f4c32b06e90267dc235e0b49b4f0835ab31930c4b3fdb162. 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/LTE112300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747cc0d62a291a98f56a0160f10092ee79405dbf395c398e0cebc0aaa643256. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LTE112200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf646858fa6e26d59de46fe7ea64875e060c4c303ca4897c82861c8d922cdf957. 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/LTE112300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb90ceff89160c093cfe9f40b5711f6af3f2323e17d5a469d8e52ad058ddc1d9. 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/LTE112200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a8f58c184c4162db980ec605f842cd74038c22f129b2547c9f14dd4227b263. 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/LTE112300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4efbf7fd1abc385c8433f4386794ce3431308ab74472b180ea8a564b2e218a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LTE112300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f20c5be5ae3395118c23900527868182cbf1c14f1264b061babfc1a9b4e7cd3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/LTE112300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf134d5ef47ace3d02a885f44005e08e7f858ea9f25f6ec9f06eb24a0a91f7778. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LTE112300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83fa7d47f07cd7aeac74d30d1170d07e414aecbc89adaf8e0ee738ae7b1373. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/LTE112300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97fd5fd9b778d41c920608c48c3ac4b6bc44e4718974e295993badc19a0794d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UK6822326807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96829d3dfc6629f4c32b06e90267dc235e0b49b4f0835ab31930c4b3fdb162. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTE112300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a8f58c184c4162db980ec605f842cd74038c22f129b2547c9f14dd4227b263. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/LTE112300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4efbf7fd1abc385c8433f4386794ce3431308ab74472b180ea8a564b2e218a6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/LTE112300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf646858fa6e26d59de46fe7ea64875e060c4c303ca4897c82861c8d922cdf957. 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/LTE112300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747cc0d62a291a98f56a0160f10092ee79405dbf395c398e0cebc0aaa643256. 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/LTE112200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb90ceff89160c093cfe9f40b5711f6af3f2323e17d5a469d8e52ad058ddc1d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LTE112200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc42dc633c68185e58d6c7b05c9101d5a37169de6800576d4d7428e57dfb21a. 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/QZNWS2231050.