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 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 0xd668b1a01c2b8fc77868c3cc5c081ad392d19468c5350e290330bf86ad9e4914. 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/cd98f359-e508-4e0d-b5ea-85492a2b4dc1.json and https://artists.proofprofile.net/proofs/artist/cd98f359-e508-4e0d-b5ea-85492a2b4dc1.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 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 0x96a08c96506707d8494cea17a7bcb4e0d90014fb7db44b93005863c79584d382. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ART721210271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e3f6e8896a317759085bb85bbf52fc10cd0d282e42ddb5851a6d695442c94. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ART721210272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6121a2c7485fbc4ab40bb0f6a69bf846abe2eddca7746c0a6950a38dd634af. 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/ART721210274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883b2acad4419ea09919c6ce0e38135b638f68c9c3f5618dbfbbedc32a1e742. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ART721210276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33237e823f86f376679d6b9f9e03c765e1bf4f27c5d49bc00e28038c23191762. 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/ARF051700361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fecbe134f6dbccd12c7182a33b5e91905eff88080532d30d1af9ba7f67223f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ARF051700364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd5fbe640407902a99ad9f11a41f22f934043936daa071165663580c8c4c543. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARF051700366.
Canciones para Escuchar Cuando Comienza a Amanecer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f7388213b2c4a3464fc1ce8bac0043a1110ec5e62714a75f8ba05db43d3b94. 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/QZNJV2106675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c1c2520eadc44ec2209317358093f6bc31d61756e58f4fed44b93187315ba9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARAE52400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd68e2e3d18cc62d58cfb9ad870e04b76c2fbbd3dabc6ef6de31d5cae0c268a. 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/TCADZ1850346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1b3b57b2066a1388789899f9fe9329ebbbe2b55c0f08e7ad5970c6574b5011. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ES71G1608509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959912b072077982e55cb4e3921b158731f72f4528de13710ff728e5037c4be. 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/USDY42181035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74191cb863405841c097e2e97b99c52346276c5a7d4a92a3eee93d83e4a5178. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ARHXW2001679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679b5bda7a00377956fa6b8d0d4a60ada2ea5aa2b0062928dcc2c68c349667ed. 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/QZAKB2421725.