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 0x300b668fb196c9828ff0374463b86069eb917ec3c6495b42db97ba724c349f97. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/915421a4-04d1-40d0-b70b-5bca6b702005.json and https://artists.proofprofile.net/proofs/artist/915421a4-04d1-40d0-b70b-5bca6b702005.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 0x15ac1a58b26c9ccbd54b5b4e2730dde8b54460afddc4c939fdd0eb8d36cded9b. 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/QZTB72399633.
Banda Infantil y Juvenil San Mateo de Capulalpan de Méndez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cdcf682aa0b7aa01e6ccd60012e14f9b5dbc72f68f8fba2d4c1d27e94a22c4. 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/QZTB72399634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe417c0ebd3e4a5796114fd63f4235af9b2686d43b1e72453f569e1889a36670b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB72399636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c22fbde61f0e101fe31291a58414a2bff7596ef4cac6a7635a1b8bc7566fa. 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/QZTB72399637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ceb07898a52b3991760ed56bd6f839b9bf8adc23f47793e29cb45c7e034ddf. 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/QZTB72399638.
Banda Infantil y Juvenil "Yela Too" de Guelatao de Juárez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5950d4248c00e744836f5c8ebde91d94ffcc58bdd8505cb7f572cbe16a4775. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:47:41Z), 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/QZTB72399635.
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 0x1feca536fecefb3d508ed429b8617ba59d06aa95fbd6b56b32d40971766a9793. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZTB72399632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef9f161ed35c19a3310ad82a56daff00368441e7a5554f2eaaab9cb8c3b5f64. 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/QZHNB2273688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d87eaf98ae589d063bfe61d892386651cfeb6d3acf8c84ab51c4f36d238df91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2273689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9345d4347e5136d8dc3e653ac3ed5e34a33063c2623b1ea120999d84894cdf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2273692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de2072403be44d5366b0526497005c2a4f87de1f1d22d5201e2f0d8e04f6a8c. 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/QZHNB2273693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e29166d3857cc7df497f57c98d19a4571a41f24c993e3ab9ec8fa6f1442457. 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/QZHNB2273694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78c3e0442b96596bf94935620ee3b6110e789ca059b489e391effd02e8843e. 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/QZHNB2273695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedb1fffda9821c537e4e52159b533dd4992d8dcb443b2d081469160725cac75. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNB2273696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8cd1de8e08e742e641d05d7d63bbc278ddf13872c2d78cb7f9e7357beba44. 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/QZHNB2273698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89b4e73bf3828c83e3baaf065f40a46701842d83812d68ea6c7d69ac6401623. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHNB2273690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a80ef76b162c5019544eecc366a956d173aaafc8ef5ef37c599a0e79a7fe08e. 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/QZHNB2273691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f416de911aa44f1331f7cd0f9dbcfabbfd286e1d9adfcca7a012978d466c940. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZHNB2273697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8110e5272e351cde17e358c65557256bad736d2fb0fcb75b07d5ae6902367. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHNB2273699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024dfe603b2968af3fa4be991b100638239d0e7043e027d37c4413cd928f8510. 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/QZHNB2298821.