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 0x6a99929238c8fd7fbc19c53b3999981d3f0ec67ce8aa4afeff35401c0f5b8733. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8223e61-e79e-47b3-924a-3ad964f11cfb.json and https://artists.proofprofile.net/proofs/artist/a8223e61-e79e-47b3-924a-3ad964f11cfb.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 0xa61d36446167546665989cd150d5be519064e3866c369b82cccd41a1cc72a36e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHNB2082330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b888b1ba77b659118a51143d3b2469c3fababbaf8ea176434b105fc288aef. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM3DF2191206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd74a6420720b0b30c5b258117d844f7e310c7a3af4099ea59198d826392ea. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM3DF2141679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abde375c29bc0f6ebb92a6bc83a7e2353360f526da822ea0a7ef34fdee7dede. 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/QM3DF2126717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d5de78a6b6da9ef7ee2903a533c33d7cf0c3c4f550091809340637d1baf751. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2182893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cb9ad7c6fb1fc684a75bd8ae449b971f1da66bf65fa38e059b20ab6c46c2ea. 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/US3DF2146926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e030545d8f911ab449b6012b48e1ecf457b1dac36aabb318dec6e56eebba9. 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/US3DF2116081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a1a8d52af4188819fe1201f029fb7d8ea7c6f944aaa477feebe3320e5105f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US3DF2100847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d5f749a0c523996970b989400b3b7d449b02b930448af4f4f961fb51044160. 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/USANG2177731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9efe24f9f41a1d37b606e22153d418b3607c221bb5b986385bbcb8731108e6. 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/DEQ022012509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a68c0ccdc5e4cf4813a85469da2282c7304c2e30dd6e9d62b82c74ca10ec5. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEQ022012508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7c7bccc767c99113a2192e6804fa5cf2d2b20dc154b1a1474811bcd9384ccf. 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/GBKQU2199397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e2f67f52c581b7a296ef08eed8d75c7de1a8ad1fc44e88485d1b30ad822dfc. 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/GBKQU2199398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba37571452ddaf35501f41242b8b2feb4e86e4d382683de2fa12451e27413c1. 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/GBKQU2199399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3202a4af6239f580285c1fd3e116bb857afe2329d23c5a72f8e5efa546b68b67. 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/GBKQU2199400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7162ef54caea35f245d93c41ca5d617cdb2fa14f50e5249cfcb0dda59629bc4. 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/GBKQU2199401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c9b96166a0c8ecef2d076675c1a2a2e04d45642314ccac19057f5fadadf02. 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/GBKQU2199402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603c1e19e7f315c7ed66912f35a6beab8b13e813ea5c735939f44c888f11e8f3. 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/DEGC62102457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc1754559614807e140ce5a707ab0c67689b58b4d3c9ebc0d84681f5dd62bd3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEGC62102458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444b83b9944a7efdb43925e2a6202bdf746490d27d2ec3581e49e38f4077ca42. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEGC62102459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcdba559c9bd80e8a24967b8b1273502c3fed3f50c641fe83503414890c0a4c. 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/DEGC62102460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66014c136584c52dc580e06bc7f0f648c7456689bc92f507d148a4d7ac036f06. 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/DEGC62102467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e203378bf687856a289d145a43e1c844ea95f481fa358d36a8b69b6e537983. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEGC62102468.
Lofi Treasures: Beats to Study & Chill, Work & Relax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fb5f3260757475c69f867dcecdca415a6584961038c759dc1b6e0137e278ea. 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/DEL712100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2a2310a09e9f47c95c3a6c1ce4b89ed5e28c9c878b00deb427d668f8a1a430. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEGC62002247.
Lofi Treasures, Vol. 3: Beats to Study & Chill, Work & Relax
Lofi Treasures, Vol. 2: Beats to Study & Chill, Work & Relax