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 0xe28018765b203b3611c69ca6a43fbff8b56d7f57d5b2ab580da12ce2478e4807. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14353e82-2710-400d-941a-9358c4183e31.json and https://artists.proofprofile.net/proofs/artist/14353e82-2710-400d-941a-9358c4183e31.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 0xab06544955810e742afb4a6626f07df981c8173a543f9d6f30bae30ffec3da0c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:35Z), 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/QZMEQ2038828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019584ca9394d8350965b0c6e7b41417029154f9b5a52dbb8ee38b93e83cd4cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72162211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb30b5a728f35f99b92c3daaf1aca7e47a617ff407a91b99ae6568e91538e5f6. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZFYZ2295813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07448ff2b695117f8816627363699f729b34e413d6f28cbb251b25f507c5a7ac. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZSYP2216561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77239008e3432400678647a205f50dcbd88b1f515b7f632b8044824dc1d7f995. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTLA2310809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ad2a13022798ce06a2c2288c36a373f78576bf4b59d051e3a78bb6c7ef65c3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:08Z), 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/QZTLA2365736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945ef674d81d617978a87a21decc148ef3591a93db70995e993a0e3e443a4957. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:38Z), 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/QZSYP2350210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6737014104bbee87ed1e8e4f5675cbe8cf169254c3f575eb57dbed0127743586. 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/QZQAY2300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a18bdfa12e86bf4ba4e2219056d97b00a42abe89ac1e2a0eb52ed4fe7260e19. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZQAY2394256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3416835a0c682b379ad304d54b0d40425becb1cd6146ff46ee04f6aa5569ea. 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/QZS7J2390458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce93caa4d28e67151252f447df1472154bb3859e443b9ef0b2e2cda3008cbc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZSYP2384616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d307de42b99be2480d5e46a13271d2054c56b251374e7d20113bb2259e423ac. 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/QZS7J2355399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d307de42b99be2480d5e46a13271d2054c56b251374e7d20113bb2259e423ac. 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/QZS7J2355399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe034a0ecd7f1b6b0bfde218763b0004dd680190120c7b07d6ec48ad75d7a63b5. 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/QZQAY2483245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e9618bd4fd459b64375b8ed1053de2e1ebc9d1cb5a71ac3b62941287f54a5. 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/QZQAY2458635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a69575250cedd35d2c9804f7dcabf5cd2287edb4371dcf319739823b26285c0. 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/QZQAY2417433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00df5e4792afc8735e4441c0b0e86a711b367ad63b754ebc039af0fddecee6da. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZQAY2435841.
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