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 0xb764251eb4ee3bf49925d8ae073000d851694f748eac2ddf12f5d07e4672c132. 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/f2ce94bb-c17a-4fd0-8ecf-beb379c9b042.json and https://artists.proofprofile.net/proofs/artist/f2ce94bb-c17a-4fd0-8ecf-beb379c9b042.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ghosts of Artificial Trees (MarcoSouzaa Remix)
Sometimes I Feel Lonely (Piano Cover Album vol 1)
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 0x38ebe3b6c7d613556650d7e6f338f1da6bd80dc2aedce07423de9eced70d86c8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6L2137046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7912c76310c041eed4aaed6fcc5a23a0684b7b41525d08b90e515d8d0a2c16db. 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/QZK6L2137057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0ce5fd42879e8575861d3e8c32f6be100edaa9c34424536a2173ab8508fb2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFK2314593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5c36b3c8bc487e440d329b92dbe9942355caf48e99122f8e645ec3e48c7a3d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN81963741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80291225d621a9271bb9fec766d27f81ed47f9caedf5bbe0d52ec0dff4e808e5. 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/QZHN81963743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d63cf2cc1f721700128d3f5a64ae3dbaae7bdb39965db88b0776d29a13932. 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/USE830935950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925bc6f7e548d8b6523f95a9e6f7c3bc7d83e0f9eba1cf2368343398289a6589. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USE830935952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8a6982149920cc35bce43a5e55d7c06fc4d1fac7ca464bde810cbff347d5aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USE830935956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3365bdf7959f1484c1339be91546ae57768fe0edc08a72f6a8991d0ecf0f3ea3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USE830935961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9925645d6e16f24ce4aa7ad2914fd2df3ad8edf56a5885b075638620200601. 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/QZS662206290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50159d93691799f2e5d53dd7db4f90404cfc3c8e578d149a49f35a4460071a2c. 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/QZMHM2328294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4299e72792322dd8c9147f2d34f7fb109cede7141424f83f3098fdcbf7af0cc8. 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/QZMHM2392553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee9a7895a8498bdc35c6275c1e405b5491889ff047cc66752720d04feb85e5. 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/QZS632237924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194b215d7f2d21e7fd1fc4b666fc1bb7041e47e92c0157d8727e76969c2b4861. 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/QZMHM2318608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d9b4d5674fd57dd76acfefbd456ade92791ea575ad23051cb69e137508922. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMHK2321825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5735decd46adeb214ae9c5632b70a3430c8ae849111483c4c99c21caaf425335. 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/JPU961600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2225a6e020b272de7142211aec59168768afa0a02db4d317b24cd75962a4b005. 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/QZGWX2154660.