Otters are carnivorous mammals in the subfamily Lutrinae. The 14 extant otter species are all semiaquatic, both freshwater and marine. Lutrinae is a branch of the Mustelidae family, which includes wea
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 0xe605492a8b2e5c7f54cdb787d05fc160a0a6c811a5ede7f8e0033fc13dbcea86. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80ecd515-0caf-4532-8e27-785064c0e089.json and https://artists.proofprofile.net/proofs/artist/80ecd515-0caf-4532-8e27-785064c0e089.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 0xd3fa30138628195c7041ab60e7176ce1aca1025038cbfe862a8325526dc54f8a. 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/QZZEB2358718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6e1e4aaa30b2906174f06fc410edab5ac834c8730f6b6e4dbd9083a4c7324. 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/QZWV32444439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fa30138628195c7041ab60e7176ce1aca1025038cbfe862a8325526dc54f8a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZEB2358718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826f00abef84cefed8b08c62ddf85a0f997b0abfb32c2d0829aa1cbb2a93eb2c. 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/QZZEB2359538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c034533337516b57b2c76256e8e1e0f14dadebc08fed73fe92926d3e956707. 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/QZZEB2358108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced560221cb1f0b6e9a9a1f0d2ce8041d22898c6803f0ad79147cfdce04e8f6. 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/QZZ8A2328504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c4e34694423bcdecc851c27b53101c7f2ba638b7f9572db87236e76d89a971. 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/QZWDD2339660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e2fbe9230f2d44b85bf3fb1630904cfdf7397ad0c397ec34332eeea1255400. 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/QZWV32444364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46aefabb02727c1a9c2e02add20ec603753c75df0514a5738a792bd9aa69b39. 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/QZWV32444368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e905e02fdc314705dac67ba93c369d9db37761e96466b3b44ae3643257ae73. 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/QZWV32444386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f90c9463ce9ee015b03a7efaa82ee642f4ad3a8057539b18a3f20ddbdee5f2f. 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/QZWV32444408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9709843f9bbde36bff145382505855f6b8f8b74fb58e7e976c97f3ec109e39. 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/QZWV32444420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634281b106c9c8fca20048f32a42735ff3adf9aa36e055466770173c9de0a82c. 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/QZWV32444424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518baf6e70717e34590873e9714b3c58b630167fd8901620f296b6979daa480c. 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/QZWDE2412749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c6e1e4aaa30b2906174f06fc410edab5ac834c8730f6b6e4dbd9083a4c7324. 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/QZWV32444439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae2b0ca928ec6e9a371a12d6b19d051b21e29e9a1fbee5a1372d67e44dc5859. 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/QZZEB2450249.