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 0x9240bc80b07aa085c6194e160d3b17aadef0b2d7c2556c124e545da5a91c587e. 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/d0b2e387-27b7-4627-9da0-fdca479d2490.json and https://artists.proofprofile.net/proofs/artist/d0b2e387-27b7-4627-9da0-fdca479d2490.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 0x50cb7006bac161c2c21f29cf097b32ea0591677848ce10cb528a7debac9ad7d1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DKZVA1661081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc804c3f519076d6d437992a1d93eb584912ccb4cb5617b9a560da5d35a22369. 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/DKZVA2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d7eec7f754e1e346bb1c3af9edca2a5c42f8894fe5aed661881c6374e919c. 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/DKZVA2000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95513a4993b330ba4e4c0d41397becf4cad65947b5654a220b9457951784650. 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/DKZVA2300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca2db6fd0ffad7ee2ee91e9f113a029108290d61daf182b6187f828727bf162. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DKZVA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc21357e4a52c01c6416170b9988d6baa6d3230254d89c4ac83a98d6c9a3ddc. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DKZVA2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b049b6831a12861a4d0a738a1fb2c7cb82a102b3344bab14a12ce8f50bea61. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DKZVA2400033.
Echoes of a Previous Life - Original mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb95869f58ee8aae0f0797df1269bedc59d54e0d835e8f557df489c92777a64. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DKZVA2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483f4d80ac00489417d0512be51f3d7be1668458e01f1b54fd175cc7657b0fc. 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/DKZVA2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aa3be9e82fb32d0f95dc26b491d4491dcda614491ef3a2d540a8380be7e437. 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/DKZVA2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0483f4d80ac00489417d0512be51f3d7be1668458e01f1b54fd175cc7657b0fc. 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/DKZVA2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a967fea89fe1375a57777585b29e17b84356e28d6c9fe74e629c1467a9282f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DKZVA1160901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc3dffabffe76c5cc637327203192abb0edc734f6a1bf92a373ce7ba82d4ae9. 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/DKZVA1761344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3fe4fa50028fd027f861a9efb719930e1cbfc8c8fb1b93e62aa55bf5ff0858. 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/DKZVA1260116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de945a8b43b8661de5dcc89c270ff483189a1702a2d6779aab6e70755792b8. 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/DELK11300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7996ff7ce4237b3fa9766f484470705b71fedc758a0dd6fe27887fe8d61a98bc. 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/DKZVA1152009.