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 0x43a72ba4c4d1789b5acafb6b7a43f5ad7b0bfb249fcf4c1c30250ede7879b281. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8931b282-fdb4-41ec-8bf8-7dfa52edd7d3.json and https://artists.proofprofile.net/proofs/artist/8931b282-fdb4-41ec-8bf8-7dfa52edd7d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hirviendo el Mar: Spanish Baroque Vocal Music
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 0x5b557f6ecc6df5322c8aef11634e976d2c46c9d11f931e5f1360b170589c5852. 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/ES29G2205705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabaddbd664e27c01c6c606f504d3b14c502c51cdf0835e39c5bf126b5f144b6. 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/ES29G2205706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4197d84b2e508ec38a80fddac33a5a22ec5667716c98c05f1c1f0076b40787. 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/ES29G2205708.
Prólogo: El sonido del paisaje castellano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631eae58db43130caabb76ca9ee8aaf00c901fb7bb5892a297ec54a5b2a14fa. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES29G2205701.
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 0x8ba466d641ffb143c832828af067e0ae84e88a611a3bcd5b7955dd8e731373e3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES29G2205702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3601a93d32b78e00cedfba0f047d6c51dd78cdcc1d81e5f2d3cf268787a5e4a. 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/ES29G2205703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c4e7e641fd154f84b59cedcc0227846c9ff6aaa0a19365cf4323687e06d77. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES29G2205704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39ccab6f105609c1359b73137a106203c7e04332bb93410575ca6473cc6d317. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES29G2205707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0970223fc5f4afc4170115be910960588313426eeb08bb371caf5d8e04c29624. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES29G2205710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050e9d57136ab5a7f3c5287e795825ea992c03c88e3693e3111cc5bb8ac009ef. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/ES29G2205711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fc0c8c674e8d3509c8c6ebbec9a1857dac2402576941522388bf9104f58418. 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/ES29G2205713.
Romance de la muerte del Príncipe de Portugal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0b742d53b299461228f859a899b0913b1cb6f0c18bfbe8cbc4021809e6f76d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES29G2205714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d5fd8ce4b796d405a600754790ce7acc8728c9d3896d9d126bfd487dad1d4. 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/ES29G2205715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b703830f16cbc2996d6fd54e1672494c2ed1cd0774819dc439ad68d006053bf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES29G2205716.