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 0xc9087d5c9ca7135a60acae01204d75cfe3a3825bccfda818d9e04034e1289350. 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/9629ddc1-4346-4a4d-bebe-e8b368398be7.json and https://artists.proofprofile.net/proofs/artist/9629ddc1-4346-4a4d-bebe-e8b368398be7.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 0x5da7d66381c68b99e78f50494c4aa66bfec3d5f807ef17e979b495e6cbb32c11. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/COF010501533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443e7d0aa3f3a045bc1b0fbd31b882c56813493f0664f3bef5b69dad72985a8b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:45:47Z), 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/COF019400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715f9395fbcc102d289452d1c920858e6e66eb7384d2a749e1438c36fbd49b43. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/COF010501530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145c60ee2031dd98659c2b6a9f8c240aa6af7472a5a2f21fd6dd6b8069bf35c4. 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/COF010011792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ad5e73a2f3cbafcb4a41481272bac996ee9133bd34a9682f22fb9ddd189688. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:01Z), 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/COF010011782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86158152997f73dc1ceaf78b8958335f78165e64dcfb06a8a2f494c67b746b9. 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/COF010501452.
El Señor del Bolero: 40 Boleros Inolvidables
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775ee2f51d7c97ed154ff359979badc170061f9db5b8dfeace117434e6146f34. 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/COF019400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cd6d279dd2776631cb76fa3982416cf74d0c2c2cf8ecdfccb2e0bb53bdfb3c. 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/COF019400665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6639ee7132f8faf31c8f52d860b2887f607d08d00a7926fbc0360c31d5e33a. 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/COF019400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6824d7ee01d95f2868bfecb99489ff0005cfab5b8aa3be6c71c0c0b193e9ecc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:40Z), 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/QZ5AB1732216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82be7b261e6c424fdb92f46a12b92519a8b18e5bb6a5735205b3cce490065550. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ5AB1732220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81861525798fce0eaa0de83067049b80a027766c52cffb52191e84cd6c0eb0d6. 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/QZ5AB1732224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5983a9f123d5b4e05124ee4f331e6775ea14832565a867005a4530ca1f84364a. 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/QZTRX2394250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eea3491afcb459527da2d45871705ba30ed8f297d4df42697545f91a85bd7cc. 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/QZTRX2394257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ded9f503483df079f2e156faa57a6e4f25590c64d692e0829eb6866acfdea. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTRX2394259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e56dd371c6c37e317b0e534c25fd1690ffed452f6a477b4b091b122098a0c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:27Z), 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/QZTRX2394262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d89a7594457b1450b4acb3ce494088b54385bdc1fb6946c1f6377a6ecb31012. 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/ESA011844857.
Narcos, Vol. 2 (More Music from the Netflix Original Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115abc385c95ea60bce175e077a316921f401f253a650d8e38333318c9fe7ee. 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/USLS51685806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640df1879144613fb3fd9fb1349cdf7eab41c067f63667898577766529dcd0dc. 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/QMFME1561366.