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 0x8f3d69bbe57a2df098f835f78e4a640ced36e0d64167f0b373afb257a3727648. 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/a7b93dea-2c47-4531-b0c6-ecf23c691060.json and https://artists.proofprofile.net/proofs/artist/a7b93dea-2c47-4531-b0c6-ecf23c691060.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 0x9ef9dc8f076d06bf44ae4ecf1e2cc71de19596ed5aae828ebafbb08eb2ef0114. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/MX4971529900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d50b875b95417a31d1cac43179a3c971e04289dccfdb8fa63590ec0b2b4dd06. 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/MX4971531310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea68e274b8b42b403806efd36d31348184f77d96a13463f52126d0376359e6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/MX4971531313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16fa4bcc1b5c26264daa4e90a918501781791c2deb235d3816b248f1002baf. 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/MX4971531314.
Quiero Mirarte (La Grandeza de Ser Pequeño)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9a655f4f541a5cf65c61ef1830248b4ab9e1f17e6f3e73509b1c175acfe8fa. 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/MX4971532064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b6125ce107878f8c5bfe3153343594e8811b7622e2ef077dd99ac4df43268a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/MX4971532066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e637d6940114d871fa3965cdbacad519f95e766d007fe48887f125e1a8310. 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/MX4971532068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260eac4b3819d839f8fa07c5e33f42cc9225403de54d42f671a81c9780c7c42. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MX4971532072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d32cb7b2bbc6a3825430260065e771646da3c09358d84108928b72418f04a65. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/MX4971532301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f46469d62daaae3586b5c1f4eec0295f01a3ac86b068d246a777ba0cce22741. 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/MX4971533024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ccd7892a0ac3bb453a2b7f21faa5a6b826b7ae064ef2ce6916242272f3d35d. 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/USANG1915788.
Titanio y Sus Amigos Presenta a Grupo Kachimba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7c2128ed03443be2bac608dc95a1f8374ea932ca3c97cebd6df730a0e4bc94. 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/FR2X41919654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cf0cc28868c69a9d25ec0f025b8097045ce611167670bc99fab8cdbba350ec. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FR2X41919658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16889dcb16876e29507a8e9182f8652c2d338d66b734fbdda4e10d5bae8d8250. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2014205.
Me Duele Amarte (Me Dibujaste un Mundo y Nunca Lo Pintaste)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07155fc35757c0bbf988ac49e77f7cd79550558335d3a399a6afe52acdee3d98. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/MX4972150128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20feb65a8017b38b522721dceb57ebc733dc5bd9c9ee4751e18814da78b10ef. 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/MX4972202288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3479a35fa166598ffffc9f20f33860bb9df757ddac3a2dc361c1f1a21d8c2e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/MX4972500911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6382b83e3fb97f14d14c5ad16184a1792cea3e984da3f7bcfece14a95698de91. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/MX4972500912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5bcfc636ef76f80d985d558c6247bdb88535840891541c65512134034b93d8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MX4972400076.