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 0xc78c49c32a783ee1c131bcc9d43e75a559f939b35a92fa74c15524687a8fb512. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7946dd9d-46b7-46f3-bc59-5844c211b042.json and https://artists.proofprofile.net/proofs/artist/7946dd9d-46b7-46f3-bc59-5844c211b042.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thomaskantoren vor Johann Sebastian Bach
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 0xc153de476cede436354a53eefec17f5f5c09590b0b31ab432ecef1d1711506b1. 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/DEB111207105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a51d19c1c13e14ecab7c73a488a9d4e25af3ca4cd1f70a013022f9e2c87ddab. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEB111207113.
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 0x6a3acb5c9783fda36502df67704bef11fdca6dbddc8ca27fd8722e2214dbbfac. 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/DEB111003001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2c6db15cf16552e7a927fcbf9e10a11475e9ebb2442e95617ed63741ad3ccf. 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/DEB111003002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0157e3c50f67df9bd6fae15ac355e99ab1bc0ac0df487ac59688c199f5e5c98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEB111003004.
Missa Pange lingua: IV. Sanctus - Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02abab315ac762e53d0e391819798bcf01f119c089f6761124360e82b829193a. 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/DEB111003007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec724a23e008cb7c05ed6436ba8e5cb6138d10120121dd23676167ca721bc32. 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/DEB111003009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cdd45825f0e21d511859f332aa087d310cf70cea93b570a42041ffd7eb5be7. 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/DEB111003010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf130a3f7e418b7b0f62571053cc45a4d3fafd0b3c9070484a332310a6cc6b76. 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/DEB111003011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ccdf1254d8340a4f99eae5e703ee3eb516e8889f583a592a9597534214f19f. 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/DEB111003012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492510b9151e957bb17845b50d217a57cf0cf7270d344dbf66d019110a4a5cc6. 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/DEB111003013.
Totentanz, Op. 12 No. 2: I. Erster Spruch. Der Tod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd6ba6f14b6428c05840984c539d2418e978fbf42b4eec03657b2877a2cadc. 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/DEB111607401.
Totentanz, Op. 12 No. 2: IV. Vierter Spruch. Der Edelmann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d322e58a577223312e5cf2ab0456e9ac53010dc3808ce24d667096366c97b3. 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/DEB111607404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac50c1355d8f7de407dd88e2f1e3ab974ba13b52c0ab652b33c7320a063316d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEB111003005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d3e6aaab3ef6ed615353f74d9849186bdb5436b3662b1a42db48ca50241f98. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEB111003003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd15e09c3ef1a72c1f636beec798cb0c6cfe71f8b4d87a7bfdb58faec09302c. 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/DEB111003006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596e86ce22db296829f07a9e925309f4828839d034ce8aa608ca5b88cd5ae051. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEB111003008.
Totentanz, Op. 12 No. 2: II. Zweiter Spruch. Der Kaiser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73120d19cb3cbe320f608cc96820530d22abaeda872f99d0d1f00fabeadc24a1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEB111607402.
Totentanz, Op. 12 No. 2: III. Dritter Spruch. Der Bischof
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56db1856d9ee0a346f32fb16c15b9426e31a019d4a5494d195a26964fed4e9ac. 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/DEB111607403.
Totentanz, Op. 12 No. 2: V. Fünfter Spruch. Der Arzt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2041b06acc5eb4d6a7ba33a806f5bcb82e2d05895bbd59feb9810809e29c1316. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEB111607405.
Totentanz, Op. 12 No. 2: VI. Sechster Spruch. Der Kaufmann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ebd83ab73a0de33b5af5aa894cec01a89b4cf585fe3c1732565a3dabb0b4b0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEB111607406.
Totentanz, Op. 12 No. 2: VII. Siebenter Spruch. Der Landsknecht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2188f247f144eb6a04683de24d64e8f36e2a25599440bd836659e51c5e7450. 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/DEB111607407.