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 0x082c4f26930c5862fcab898e9b195617f0af279d7165b995014f7593ec3b7a37. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffbe22c4-f8dd-4361-a828-7d90f23eecc6.json and https://artists.proofprofile.net/proofs/artist/ffbe22c4-f8dd-4361-a828-7d90f23eecc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chorbuch European Folksongs (Gemischter Chor)
Glaubenslieder: Neue Kantaten zum Kirchenjahr
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 0xb26fbb841f88085815f20e3a5c32234c9e3a6d9b3e3c11d246d671a6b079c51d. 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/DEB119901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872bec715acd524085333978cb3e8b85c668915a6b3bca7f21bc983293f6e1cc. 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/DEB119901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c46205fae924b51cd412b9d51a3b998b4d30198c8ce04fc75d3b89a41b5f3ca. 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/DEB119901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994591ba83dc5cf1c3e6ab8ac62bf52cd2a25ec123fc319a33b76741f83549ad. 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/DEB119901121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09afd9cf5468c82a7203d5efd6524c77225997c8b95e3479d556364ee419be2b. 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/DEB119901126.
The Herald Angels Sing. Choral music for Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40fcf21d6e4da9242d7abca563710050cf505196597fd305ef2c30d1ae7c16f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEN421520004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf3d6987d06b5ee82e4be08c6344d36e87d95c6b5d71abe24cf3bcaa33c3e8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEN421520005.
The Sacred Concerts: In the Beginning God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f36404e3581b3e31c359e687ce151ba23d7a70e29e337e3f10b6e16a2eb8d39. 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/DEN421520001.
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 0x72fb71e08e9084509436f8959c9cdf82808d7acac05b850bd50c244dd26fe3a3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN421520002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb37b673b6d26067f23132c033a8e4f48733af44628be9d2be95e4666e0fc11. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEN421520008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdceadbd16aecdae88afb940a026300d0011e48e03884191c49aaf7bee5a2580. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEN421520010.
Eric Whitacre: Choral Music (Hope, Faith, Life, Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf4c1ffcd440bc9397fd6278d995f79374663f38e09c9a9619cc9dca42dc6b2. 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/DEN421218001.
Five Hebrew Love Songs (1996/2001): No. 1: Temuná (A Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5628a3fa12bddbc6cafcb32eae3e1cc80eb32e98897622d266bbb961aee08db. 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/DEN421218002.
Five Hebrew Love Songs (1996/2001): No. 2: Kalá Kallá (Light Bride)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2989e577e7360f74363101c7bcc6d693364dec70a0b03ba3e58d7ffc857a1bbb. 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/DEN421218003.
Five Hebrew Love Songs (1996/2001): No. 4: Éyze Shéleg! (What Snow!)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9a3f4b26734f4dc4b0db56b7f4195ab6f1ea91fca9d26efb1705526bc0c292. 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/DEN421218005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf584ba14b80fd10a4e0010505a23f62ad7981a039c25b63b2e58b71ec40ad1c0. 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/DEN421218007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719f35ca79d8f52360776b87f729171c131c3af492fc4b651a449051c4e9518c. 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/DEN421218013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe9dddb89fc5372137adbbc17a9b8208eebd873211400d25921b41d939451c4. 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/DEN421218018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dff445dadb88e929f6f7993ef0c9cac1ec9a985f83ac56f75dac6ca729a4285. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN421218010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fbfc87c2181a1c9fbe07378dc437141dd00b1e7baaaba6c706ef02edf20b76. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN421218011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c3b35e091739439ed117497428ecfc06e1622aacca198062fcadccae0fb57. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEN421218012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb987a696db55bc1dfdbb8f8a2519cb908fdc25b6d92717caef6b1604490b5141. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEN421218016.