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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938689be691bcb0f6ec2606b9f10499f8c4f4d464bae774a83343ab3913d3d83. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9846f409-ca71-4271-b949-c09bb9af88c9.json and https://artists.proofprofile.net/proofs/artist/9846f409-ca71-4271-b949-c09bb9af88c9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cfcb53f0f1b2b4ccb37f2fc914acc6b13518adc06094c213c1233eab83f5ce. 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/GBAJY9799804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdea41bf9dd3c639c7ed5700fee7aef4e75eea2c6628dd80f148ac4ecfe91ca8. 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/GBAJY9799806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e71fb9ebace4926a657fd4b3d06591c01f540ab590a1a2934c7f727196db5b0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY9799807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2af793fa332a25fff7edf40c3593fbcacdc58210ed696f06503617dc27fcc99. 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/GBAJY9799810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ecb79db8395b3ce2ed64aa541f47688b30b9662abf085c72d189c3112eb3a4. 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/GBAJY9799811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8683335494d5c5cfce66084f81d3e6332e8214e4bf828d84d88b870f8c5b4ee5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJY9799812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f12081781db616fba32af04e1525bc44a652a5cf609e52cd7490dc69b0434. 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/GBAJY9799814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10c294e578b776e0be684ead5ee5cdbbe50ec5673834dca7425c23b51d96ba3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBAJY9799808.
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
Waldteufel: The Best of Emile Waldteufel, Vol. 11
Waldteufel: The Best of Emile Waldteufel, Vol. 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db5965e867e020fd801d576cb3cb7c6d3eb1649716252fabca5bcede3c82adb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC9303266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1266496e5d9a32e89a264b8c372d0843c63c41dfd2097a60879519fbdb9693f. 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/GBAYC0704673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1266496e5d9a32e89a264b8c372d0843c63c41dfd2097a60879519fbdb9693f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC0704673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1294d9f8bd63cde6c1f4d3ffc5cdc061dad43e0c3533526a3716cf8ffbf065e8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLA309500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2323dd1f310900c63bd5e402f68d8a2b890d550f98ec628d23964c54205f4c3. 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/GBAYC2000866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd619d54c3708b0c081fb70b7d48e571d7b99f0ca6a91355fb17e6b264bcf2357. 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/DEF059603750.
Looking for Europe (The Neofolk Compendium)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f7e3bfe43926fc019d9574632ee43221a7ad6f50bfe4bfb8c6d873ab143f61. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DES561599848.
The French Touch, Vol. 1 (Les chefs d'oeuvre de la musique française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fcc053b798f4dcd1b1266725f67bc303a89b8fe0f18258e58a2ffa246d3099. 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/FR6V80767596.
Les Patineurs, Op. 183, "The Skater's Waltz"
Slovak State Philharmonic Orchestra, Kosice
101 Classics - The Best Loved Classical Melodies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e20d6ea4ec29d5fc96e92320a8492a81822daf4e36eace07787cff56edcfd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI199352601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365c802d23cbd2cd9ed48e68e8434e97b6efe328c5c55b35084787567fc2112. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX761425004.
Amour et printemps (B.O. de "Le ciné-club")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604b8c51fcc4df70ffe4c68e1aff21bfd58000009bcdd6d9ca9ff7d42782ff8. 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/FRX089850229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb6f9576c78bc83eb453cfc71a83c238e6d8b22906ec7e34bdf4f596033e36. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6MZ1790377.