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 0x8df91009d523fe830e5fc9c54248f0c0cd2a71a1370f778398c251e63ddbbeaa. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9d8fb5f-ca34-4fd5-83a4-260f8545b7c9.json and https://artists.proofprofile.net/proofs/artist/d9d8fb5f-ca34-4fd5-83a4-260f8545b7c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schweizer Militärmusik présente Musique Suisse, Vol. 1
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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487238a328ee1586b65afc5cf82d932cb3f888543675a815bb89791affda6180. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CH0491613205.
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 0x66eb76ff244dc81c875313ad5bbac83a3fa18b73296af6d2084eaac5e56c50f4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CH0491613208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a4034ffd8053bc1a09df5a30a53094c9ce44cefe596c119b0d4311a360bb16. 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/CH0491512704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51bf3f542c6f1c8f1e88b97c19fa6a1e071467ae7de5aedf42e025303e5be7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH0491512703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fb2d6ee8536c664a82530c35f69ef57c57381fc6bc64ba50d35d0e0ca87fee. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH0491512706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf78ec49a221cab3b1f14e5235db927274fb7e82d8c37e23dcf2ad99c1d094. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CH0491512707.
Schweizer Militärmusik présente Musique Suisse, Vol. 2 (Snapshot)
Rekrutenspiel Schweizer Militärmusik - Brass Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed0ccf4e45d15c3db9023fbdf40d3c38dcfcb8d84b3da7204cf84d3cab0eb5b. 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/CH0491613804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cca34dbffc69e5954027ad8d087b8093fe02d3d4c5f7db911a8340956860f5e. 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/CH0491613807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54e9d4e1472e256b02ce01c88c846e8b1be982b02db675b4a4445bcc8787e2. 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/CH0491613809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea50040015957661c8ba8adfb2630eae9ad66482c0817bb2920badbf77e13b59. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH0491613810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a987febebd4201efe2fe42d4bad5adfef046be738c933e2199b93d15261de9. 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/CH0491613812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60233d57328a2d659514a3ef68896ac7c15dbe8ce74cac99556cec559b17ba17. 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/CH0491613813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf354dc8ca677bd891f355ee6377521e3193a54239bbac40c97427ee31f8841. 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/CH0491613811.