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 0x5f53c78810450b43c745d1e1fe18a55a1b80a015cf885ef0cc64c531df63094d. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/132c7279-fbec-4339-ba11-ba37f47025c2.json and https://artists.proofprofile.net/proofs/artist/132c7279-fbec-4339-ba11-ba37f47025c2.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 0xd2791df6b846963e5bb3c5f80359d5cdab13fcfd5e7e0165361f048f91695df3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USVCE1300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa6c52357338178593790be2bc958eead2b4a9658daace43009d45475169399. 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/UST8K1521774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7684ad37a37abf7c5bc3846e115324f19ff07628be5bece6f46e17aff15eba20. 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/UST8K1521776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ad6c244f788e2ef7d2596d08890d228bf16605d1c5ff7b99ffb1e795a16c1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/UST8K1521779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac38f3c5f84624129e63e4352eb528c194c04045f53ca45506c2988f019e596d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UST8K1521780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d48162219c6235557053d38d2070a5659b36765db7b4c715259ce9396cfe288. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UST8K1521781.
La Junta Soundsystem (Quitapenas Remixed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399850fa12efc8f05bb9f2973cb35ce09c8f5b0ce98715b5d52952ab11a7efee. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHDH1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bca379c0f098bd0719dc766e780f4dcc76c5c79f69a028ed39d3cea1b98c0d. 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/USHDH1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4a417b4bd7918b8a48cdf860deac4f60cbd1174be532f3cc328e6d05c59a0d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZES71808114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8a2a49a7753c5e49d5e4e0051956435804a7ac32f0c852cad5536e82c73578. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM8E51400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1c00c0bbd5600486c26f7dfbeb1ef392100c7ce26e1ab60bd01fc4897c1a5d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWW2567766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e50613de87f488f309fd09fc5f82650a54add08553a43842ba32519629b76e. 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/QZNWS2572785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e465775e592fa6fa0f3ce98db56b1bf03ddf71ae76318e38bbffbe99110300. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWW2567768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba99e435a80d7a4cc2bf9804388041c3d9534a676cdda7f37be526076ecce88. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWW2567769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855ae6f53659df1b9e4f5d929f564e437a60446dd0c12150dc6b7f847a3f02c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFG2554998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc486d0d30aefee29b79b42080a9e4bd1277eee408c674f03e66f51056d6c54. 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/QZZ7L2521490.