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 0xb7fbfd0c2afb7425563a6614cf184061b6254e298c08a83e3588eadfa534a6da. 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/aaf4a754-9d0a-4ffe-8ecd-073b65bf3b95.json and https://artists.proofprofile.net/proofs/artist/aaf4a754-9d0a-4ffe-8ecd-073b65bf3b95.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 0xbf6826d99e72e240e5ad34e4c3a7dcefe1ca9810921f83abfed41b778d8c8e6e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZDQH2417619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befadf39eae63ae48802929d326355a137c616adadcef91008f7c1dc348716c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDQH2417620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1843fe343217f5c3ec80d395bd68f426deddee9030fb4691aeb4e61ad66ec9a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:24Z), 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/QZDQH2417622.
Popurrí Laberinto: El cadete / El Perron Merino / El chulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541da4e51d9f30c1788bbe84598ab9023c1deb21c2218ebc4155e08d7967ef1b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDQH2417628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0a6702d024fce752d0190bc1c97d8a003e5cbe6ae4255cde2575a33b7219ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDQH2523632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743ea0f19208ec3b56ea7307f236095df0c8cbaa3adbd5007b3012237577117. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2523633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ab31ffc14466de945d08dbb6cd29acd9b684bad56afb3775a8ab14780eeab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2523634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c547d086c19bdc0dbe929675e603840384c275afa398fd922e9bcf53c3391. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZDQH2523635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a3af1ff1d274ccf7538516f2297d1216d3cedab4202a788fbcdafa2df8d727. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:21:41Z), 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/QZDQH2523636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4ee8ef966194db2f30ac19ace5817e00d2bef47c91480db26bdd4aa7ff41f0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:35:00Z), 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/QZDQH2523637.