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 0x5d59043d94df07cc119271f503a0877e5918a8f8cfc6c476cc7944a95db7a91d. 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/4dc7c90d-5e8d-4bc1-974c-ea7d30a28b5e.json and https://artists.proofprofile.net/proofs/artist/4dc7c90d-5e8d-4bc1-974c-ea7d30a28b5e.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 0xdffc969d7c873705dc99bc31f908a5dc2082a09c51d5e2cb4219c54deb4b279d. 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/ES5151501257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56727c9b724441248e188c511bb846c0201c3068da787457c08d71e2e28ed834. 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/ES5151501259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7718547fa50300c06779c687f078dfd3df0ecb781ac8dfed66f29cac63760161. 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/ES5151501264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f25e62d152d2ece2ed4b8a3cd1ac22585754c35a27bd1d24ce7abbcab66aa2. 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/ES5151501266.
El marinero (feat. La Maravillosa Orquesta del Alcohol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa149d1cb7ececcda93582dde0770bbc47ab68204440b764c07497df322728d4c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES8241728101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a86ab89eeff7147ee37db7ff0fd180c543ad4e623392c2f5e653850a95faed. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES8241728102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3961e61f3bcffe6dc0872b7bdf738ebf893fc98092b967b9a4d95cb255628b74. 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/ES8241728103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda86b95c75b2a34857a15b248759b157acc28b30be5f0174b39c193fa787a5d5. 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/ES8241728110.
Capitán Cobarde & Los niños perdíos, Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e5fa66af25abec01f0c1095cad5302dfc789c5eef11aa56e956a4a35f9eaf7. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/GBMJG1813192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254fd5980c3a9fb79d40dce5891f6ac1149c59d6ce8d7250d75a88750bd87e9e. 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/GBMJG1913033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b2cdc503a45d15b8dd09e9131a0a03275c49c9374094c3c58367eea31dab6f. 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/QZHZ32069264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c4ababf9389fe5f345818caddedab35e22e3e0a3f3305bd2d6a202aea462f. 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/USA2P2131547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaec35ceebcb3ed13d50f3e76986a2b57f4224900e54f272e91dfcb407bf59f3. 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/QZGLM2036983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ba7bc63529538a464bed0b30ef579af67a1f7aec9ab3802fd4d1866e0c3fb. 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/QZHZ52001599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101f6c36db4cb7731cfa3c2aac610ad437c2d9383dc82a4c83dc738c4e0b130. 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/USA2P2130620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5c865affe23c8726b9131754f1703a0c937a34b8143a37edb9fc4e9c1d6119. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2114663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c295cd84423edc8820c04d679c8fb5d2669a1431819d54cd064da285294b8b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USA2P2130622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccc153b589328e6085de6a561f6940dab14b4460ee8afc150e875659be78175. 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/USA2P2121179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe9a34f3c78933a2383803241a28729bb282bf3ca6c5f383903679ffb94273a. 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/USA2P2130621.
20 Años Ajierro & 30 Amigos Embrutessío'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff9c0585bf7670387b611cc5a60f92c0c8a01a886dc99254564f387b5ea567. 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/ES8241824110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f320aca2520e744a9c07ae9abd6520888ac4ef8a78676777796aa2f025c9fc7. 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/ES5151500753.