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 0x23802430debc1b59b87ce9a67947bca2e38d3faf354575fffd59baed3d7db94d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd6afcf1-b0d2-46ef-be0a-19937c29e3c1.json and https://artists.proofprofile.net/proofs/artist/cd6afcf1-b0d2-46ef-be0a-19937c29e3c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x02baf31ade9fd7f710bf700c15679cc3dd2bd800b635adb06aee83bb88eda216. 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/ES5592100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dde14c89f2531f905422284fe7ae13f543ff19834f2f94b10695f70644ac93. 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/ES5592100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177564cfbc9db34334efd80ced59f2af676d4af97d8b96e0fb967cf32cac93e2. 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/ES5592300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2619d4455bdf7c8e983cffd8d08e14e3bccdb67050a6523988dd56c32686664a. 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/ES5592300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a747ec34ad45c2476244db0f763e3b45b473f2e329a26d10133a5565827d4e. 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/ES5592300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445a97624f7f965d9f8ea40ad1dc8aaf56b7b1f2c74b8bb29ef9b6ee7cda98b. 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/ES5592300263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f096d5e674f1be98a6a9923f7782c9e4061cd5012e2bac4facd2d5333fa5bd. 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/ES5592300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff4c504025ed6456f940c379dedfa5dda9cbecf3970ae8ad568d9470651882c. 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/ES5592000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d917d1d90293a864d9adb8aec314d9ea74cec12fb7d9a4ad4016f42237ee32. 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/QZHN92068829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2dfb5c5571a2a298482f4117715fc0c83d3c224b4c74ce8be9414903daa02d. 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/ES5592000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c1b0f13570f81235a8ad046ae9beb1a3d32609f23cc1ff9f821395ae55df7b. 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/ES5592000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b51435b7c04e7310e4b48cc94c505dc93bc8ce310b86ce2c041d6598b9a77ef. 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/QZFYW1965518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5efbb52e0ae5aad97d88eaeec398d16814638cb532840df1d11518fbbd62ba. 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/QZFYW1965520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b464e728cef9d36e365f9be22223834108aa6a625c698546468bb96fc2857d8. 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/QZFYW1965521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177564cfbc9db34334efd80ced59f2af676d4af97d8b96e0fb967cf32cac93e2. 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/ES5592300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2619d4455bdf7c8e983cffd8d08e14e3bccdb67050a6523988dd56c32686664a. 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/ES5592300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3150bfa330db51da4c3c3f88a03aaf63364a51bc83d42604e2c6482e8664b8. 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/ES5592200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fdcb3670b1166ff156f9e6582160c40ae15ab84152c8851ca5eebb199c4878. 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/ES5592200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fdcb3670b1166ff156f9e6582160c40ae15ab84152c8851ca5eebb199c4878. 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/ES5592200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2dfb5c5571a2a298482f4117715fc0c83d3c224b4c74ce8be9414903daa02d. 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/ES5592000102.