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 0x58b7b01751e16b0adb897e370a9546408a4a028bbdfa7098d040620813c91144. 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/92e73d06-70c9-413d-8fcf-0fe6862b3bf1.json and https://artists.proofprofile.net/proofs/artist/92e73d06-70c9-413d-8fcf-0fe6862b3bf1.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 0x57246e9932f6f0832b49488611f44e74568ff646468231c414f935293f5cc95e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBDCA2003728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cebf34c2b9f06007e874acef868c8a79a9c68e3fd7080be24ca211dd3500801. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBDCA2003730.
Cloud No. 26 (Piano Sonata No 26, Les Adieux, Andante) - Beethoven Recomposed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb859a19530749006b92f09e338e46c1502a677fe8b5b8ae21692f2249162e48f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBDCA2103807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb869354eb38446ae5fb25d5abf14f1f907b79b24b16a6a12a347689aac82626e. 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/GBDCA2103873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f50074745839951fc6a2a5f1a560abdd22d61ee3aa79f1416966155ae95e8a. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/GBDCA2103874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e29ab67bf7ba7b9e82e96ccea55dc4279f5d0a040f33eb6e903b4b2d8982047. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBDCA2103875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d39559d005870c6415bc439b8c4e8bb4584eaee3cb76e14672e4de6cc63f57c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBDCA2103877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a7dccbb764db87d45945c3954c6fc7c1c7dfe350ed48f7f8a23f226f122412. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/GBDCA2204009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24882c81f1399f98d05c9fb4a0501512cb5bb5a4628051984f97327ffb646ca. 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/GBDCA2204012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba727b710ea5428bd49e46a72c443ed8022b33813f27ab22531f632637344fd1. 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/GBDCA2204013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4f77f9d55f491e8e4ce49f9e99fc1871b414ca8a6dad563f44f3398fb73e95. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBDCA2204014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288e5025b8476f850d256b19e227c9150591d25c46168b68a45e56cb1fcb7216. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMAN92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab5728cdb78720d964b8006b63cd617c16f4ed1b311d6ee266b532397e2a773. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE43Y2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8766097cf8fe759d983c330276911a9cf9078414ae899722849bf742ad212c8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX762335818.