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 0xc46fe6621254a68c96b436887c8aedea26192379d84359322337bd6f0acbe936. Chain 2 (Bitcoin): anchored in block 954008 (2026-06-16T21:31:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33a47163-cd53-432a-ac30-51cdf09bcbc5.json and https://artists.proofprofile.net/proofs/artist/33a47163-cd53-432a-ac30-51cdf09bcbc5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Joe Cotto Y Su Orquesta's Gozando La Salve
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 0xed6b123083416004cf4d39be9ded6dafb9f179035b93dfc4c81c32f84accdb2c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6MZ1724937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad1bb18b8134f488af39398d0c16e4c4ebfef77360f91de821aad77e58fe66e. 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/QM6MZ1724941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbe6c31fc8bde1c4398590b0e536fd2b294deea7c55cddb4246cc38c69259f3. 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/QM6MZ1724943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba7e5de63ca2c8cee2e2521564466cd8a3b8c90a0dfe8753a2e952c854b38b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ1724945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cb17f8fe544d239f6dd37ab0f8cc62e29fa8025e4cafbeaef9c26859da0e00. 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/UKR6V2342694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15d64b0dd87b8e3192447d15bbcb5ba268185395443cf7079a2d966013c0454. 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/UKR6V2342695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f255af5e0333abf55144606598b26cad867bc8957b80c7b492791ccf102e73. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKR6V2342697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3f0212a0b7cee9781c1de6d81d1d331c01da3bdb3f974af2a182384d9bde04. 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/UKR6V2342698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2ef6012ef7334f17db59cef012d202c6320490e3be0a15034a04ee5a7b7db. 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/UKR6V2342703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9bc15c7b25efa87a87644f6f047a98fec0783ef4abdcf004247a61858fed3. 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/UKR6V2342716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d223ddfa03cf5170015a54423e6d596f1759d6a8fa283131b2018db5ec0c9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKR6V2342706.
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 0x4ee27062002a02b9c2ee054a9a3ab79c4a20e84de5ee61112b3c903923849648. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2232149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0575f92d0a4ab7b4f15b47017c4958b86825da1102dc0c4c60189b3dad8a0032. 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/QMFME1461112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707b5b9d49d3db111320d0b96dc5b3990ae3234f359078cbdc345621adbe1a6. 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/QMFME1461115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8486d92d87449b77974d8ffd9fbe255fc554c5a128adeb02b5c2d2f3fbaa8. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMFME1461111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b363f8d8717966f33c8dde196557b0b2e6b4cf97b39bef1234b58c9ec30c86. 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/GBAWA9769955.
Best of Ambassador, Vol. 3 - Elegant Tunes from the 20th Century