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 0xed2f1280bd13ff516082661780474c58cd2df364acf1f6e4e5ae7fa6b37ffb0b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cdd88d3-8c01-4801-b750-bb3c17479557.json and https://artists.proofprofile.net/proofs/artist/8cdd88d3-8c01-4801-b750-bb3c17479557.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rekrutenspiel Schweizer Militärmusik - Brass Band
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 0xf26da45a445386b9948bf7d5e858ad0dc2d0b8937ec8f5c37f9c3d9f19ec64a9. 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/CH0491513103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7239b552cee203d6038b4a55e8bcb7da23a5b09ce6c958d26b6332a73f9e313c. 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/CH0491513108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf936dc4f25e5ec8287be37ef783e1793f421f572b56837e3f9220cb3d427d1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH0491513112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd81f9ec8e673a1c71d01dc7f94d22b070244d06ede7ae83d18c909182aac85. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH0491513105.
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 0x4dd2b6014bf0cdc35f9186cc0623d27abc42e0ad700998c028b76139210b526c. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/CH0491513111.
Schweizer Militärmusik présente Musique Suisse, Vol. 3 (Piccards Höhenflug)
Schweizer Militärmusik présente Musique Suisse, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0996b718a023e17da756cca8f40e283381a68e87daa1bfe2ba610322531ec0. 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/CH0491613206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab464172e176dbbd680ba73726bc3b53f541958d2867fb5af1d1ae070a430708. 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/CH0491613207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6700500084dbdb03bdcf62b65a407163f96c81bb039a2887177864d2a1c6cf62. 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/CH0491613210.
Latin Woods - Für Klarinettenquartett und Blasorchester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdd0b330a54103fbf05e9e971bc02e67f4622d252f573308d831fca3df36d67. 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/CH0491613211.
Schweizer Märsche: Marches Suisses: Marce Svizzere, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f4caa3e0dd01417853e342457ea5104628bb30a0ba28214b73164b6f25236. 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/CH0491411506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2275a824647e68646f112ed54473511843aede6fbf61433ccfe4731de289f548. 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/CH0491411517.
Militärspiel Gebirgsinfanteriebrigade 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98dd2a29b6a2175aff0ab90d0828353b34e8f9ed75b979003b7355b352f8668. 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/CH0491411519.
Schweizer Märsche: Marches Suisses: Marce Svizzere, Vol. 5
Trompeterruf-Marsch - Marche pour défilé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967a8bd09faeb359b28e2f51716389a4e2a2475664cd3691d5be3c704d2658c2. 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/CH0491512516.
La Diane et la Retraite Fédérales - Wecken und Zapfenstreich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b475b18b517bf03ef0ef6dbd5d3a7704b3d87c08d1cc9ce3d9a8fc95d691524. 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/CH0491512521.
Schweizer Märsche: Marches Suisses: Marce Svizzere, Vol. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad95cf382e5423d93642766ef558615b484e6343bf362e2197fcbc2011204e. 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/CH0491512901.
Schweizer Märsche: Marches Suisses: Marce Svizzere, Vol. 7