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 0x3792a62ed1c67077000960fa844a1a37178e16953f73c9a4a1ec49550b105ab3. 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/8854fb85-5bc5-4090-8f05-648383ab7d97.json and https://artists.proofprofile.net/proofs/artist/8854fb85-5bc5-4090-8f05-648383ab7d97.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 0xe1fcd890d7536353d817b23e72678db3c38617ef60019e058b24aa558a51258e. 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/GBSMU6472203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd558cd91e8281847d38bbedfe592dc2969b3600d3d1ad0624091faa8d53633f. 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/QZGWW1965119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab1f20ba0083bd1a12ffd71ff14e6defbc980f7814d6d6934c0313348486541. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEP2073284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3baf05ee14e16166e9f4e6eb52aa53a57bb0d9c79b4a041fe09e5bb674d239f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:14:24Z), 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/TCAFA2001475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417aa87ef5d6deed7f796c9b8c6acb0dd4645aa13cf535791f14146c2babe26e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFB2024821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7774f0d4c4a7db65cee5d80721a35b60c77eb3c95270c0e0e56d9e86b4857c18. 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/QMBZ92035398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d472e0cbc51f5302ddbb5ebd82f825c347d7894c3b62bba311ec061db993cca. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAFJ2154098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947b40da6bee8d91653b8cef884e00c491eccf31f17a4aa6301dfdb37158c39. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:59:50Z), 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/TCAFL2171627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e2f865716fd2bce0ba2909f41d5d9295fb150c96055ad968e2f16a73de685c. 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/TCAFQ2162535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4443cc082576edb90e1450a3b64c71aad2acc0a3b38312bf3138e09de72baada. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6N22239749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6dd7147fc83813be5bfacf859cbea9d6c066113d701e6c157ba05e82c76ee3. 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/QM6P42215724.
Still (I Got Summer on My Mind) - Slowed + Reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f4854efd7354170aa97b800ad15c17f2f0244b33557154c99a6a37f217ff5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6P42215725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3d55f62aaa9ce98a34f669bd521dfc417936187790cef368a0cc88d524392. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6N22285021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095cec7cb2f27f74d2b942e6c6119a40589e0c7456f8db3ef369d2d4e7b1a255. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:34:42Z), 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/QMDA62205528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa052440f9a032c7e139249ba39fbbc3b9ea2f844f87f0e11d6826a49b53a2499. 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/QMDA62244476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143a352b5c6650a7459b7607d658b409d67160b1b2060f3fc36cfd40168547c8. 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/QMFME2218640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c1449afc3170608727debd292add43ba8ccafeaacefe2bd733a9b3d7cbedb5. 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/QMBZ92315184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbb90b6694e41caa355e667d3a8c86ea3c087f81840a9d0df931223d98090fb. 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/QM7282350413.