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 0x089fb1fdb3a7c2032f75c48730d1135719c0104bf2707e1a86a458457b88c8a1. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f66f8539-8aba-42c7-93fb-e671c8fae364.json and https://artists.proofprofile.net/proofs/artist/f66f8539-8aba-42c7-93fb-e671c8fae364.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 0x485afa4601726fefde9bbbb7ec558b3818073a7debec758a089e6b40579b5d5d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QMDA71800698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b36bbb5c10a18708ce5320d99b23ef7e218187f91cf89dc9651890faafafc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMDA71800703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c1b2c74c455965f64e20e0a614e08b019465593be3ca87a1dda50ab3e47f10. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:02:30Z), 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/QMDA71800711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21abe9309b8635c2d375ce3858c1c830f8b4958c548a3da6aed3e6b26688698d. 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/QMDA71800726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4604a44a9b1a7eb9e8ec0befa6bdf76a55f336001d50b12fe3aee44d4e7e9862. 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/QMDA71800769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c1437c3980aa1371e8078a23d18a69aeff150c8f1ee64ab67a66341cb9498. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:42Z), 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/QMDA71800798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabffa5c5b3977377c47262df3afebf388e8ea42a49c874d045a3fb9d39865e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:39Z), 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/QMDA71801135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc8647f55f80ad70a1426a385a79d0cc6b458f21a7cf39f514052264c7ad309. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA71801141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa31e8fbcdaa2920c0b69ce6dd40227f5e6b742917c8089356fce13be44ea2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:12Z), 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/QMDA71801145.
Alfonso André y amigos. Tributo a David Bowie, sesión en vivo en El Submarino del Aire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acb087379cccfc98f3b631f227647a51d93bf52869248ab305e3c431b756e01. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBLFP2486491.
Maldita Vecindad Y Los Hijos Del 5to. Patio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429ca7d72522eef8025d27a01dda7fbeaf5a47cec8d6893abb5d81114658a04. 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/TCAFK2169800.
Un Día - Versión en Español de One Time de King Crimson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d193810641699790bee746ceac484f9c056e81b73ce50d138239f13ebefba8a. 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/GBLFP2280537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36508059b7291787b3d0aa7c965464359cbc3b3afa029da05dcfc6548683baf6. 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/QZZ8B2408446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36508059b7291787b3d0aa7c965464359cbc3b3afa029da05dcfc6548683baf6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8B2408446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c357dfc7d0128cacbabe1efd2bd52881fec6ce5e579d13edf26aad61e88a2dc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/MX3741300932.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c649fb7ab7fec8498331c8af6686f2f01d92d090250aff7f9b9de8b4ee51581. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLFP1792307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be801f0699db5abf9025ae5cee705aac8d6a3563c6f7d30b360f47a4cc23286. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHZ41913208.