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 0x5607941f13ebece455d4dc60abaa42126ab6fc90668822674bbc11f5d32540b6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e21bc794-6a45-4b6e-87e0-ab8c613a1312.json and https://artists.proofprofile.net/proofs/artist/e21bc794-6a45-4b6e-87e0-ab8c613a1312.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Porter: Down In The Depths (On The Ninetieth Floor) [From "Red, Hot and Blue"]
Down In The Depths (On The Ninetieth Floor) - From "Red, Hot and Blue"
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 0xdb2aa90bbffaaf9989ca00d80dd3d7fd3e64b72b1ca719cbea34c5ed208e1d2f. 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/GBBBA1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac93fa694afe46ba0d0f31fd8b13bee024c6fd7293685316c47c526ddd39498. 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/USBC19607526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7749c96db32d6100f48e01d96fb18fd3e8c7b9821355f35b5f15bc097e322. 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/GBBBA1800216.
Loneliness of Evening - From "South Pacific"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a69f29c79dc0b62944bc2a4bd6257d575a44827681d7cd9138c442053dddc58. 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/GBBBA1800224.
Medley: Children will Listen / You've Got to be Carefully Taught - From "Into the Woods" & "South Pacific"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e1001ddbc106753d881c7704b6e7f0fad90c3ef480827ec3e46de0ca8d9afc. 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/GBBBA1800218.
So Big/So Small - From "Dear Evan Hansen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195358ec95567f2359ceb0afa3b8acab3776bfc7efef3c77bfc0944c09a7dedb. 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/GBBBA1800217.
Something Wonderful - From "The King and I"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985162728cddc3ceee6a2982c202ea2d381c73e6a1c2334943a245f566fafae9. 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/GBBBA1800228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ca83e87b9a18dc9e81d9ad4c649649b38bf24b9b487fdafd027fac8f0e1cb9. 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/GBBBA1800223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2aa90bbffaaf9989ca00d80dd3d7fd3e64b72b1ca719cbea34c5ed208e1d2f. 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/GBBBA1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1ff4afc414802b965dc305af27ed75aee68399e014dd642b2e114ec3552d5a. 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/GBBBA1800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc8623d8aeefbbc20e1fc2274fba816cefdf01e0b32a8bb6aeac4e9713e127. 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/GBBBA1800225.
Till There Was You - From "The Music Man"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9d24e7a81f157610d12923447fe89986d4deaffe05531f4ca1efa2f900915f. 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/GBBBA1800226.
Tell Me on a Sunday - From "Song and Dance"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ff6106593bbb35f2a0f56febf0fa18b5ca643c9a4f21141131a4b3bc454e5. 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/GBBBA1800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441874473aa6389a0c2738675ff3a03a1d2fc1dc603b2fbb0f6129471d71589c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBBA1800219.
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
The Sound of Music - From "The Sound of Music"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f81c31b541f8fa785bf500f98bdccb304bafd90ac77ec9b8f42a02ced5b8f5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBBBA1800215.