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 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 0x8a7b83a1db994658d8c3512a88073f03443ac575ee69c3801ed2cb1dab1eb8b2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89d9ef3c-f719-4012-92fd-cc175c82ed2a.json and https://artists.proofprofile.net/proofs/artist/89d9ef3c-f719-4012-92fd-cc175c82ed2a.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 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 0xcd74701f94cc4dd39a492b4affde15773da18dc371d8f351b2031fc9d1ff293a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UST8K1888794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27f4ef35b100e74f086790ec3524b35e07efa572f9538994e875199606f045. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:10Z), 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/QZHNB1991094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09839e8d8c3cd29d893f4270c113526a22d88ba95a0acba9fbd1f2be38f4b698. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMPKX1882661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4099661190f680df3cd64f054a0b46e6c71b920ee2314a4719dcf973c26cec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA61952280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6a747ce45f2c04351ce52d4894c3d3ae96aa9401839c7427228e362fcf086e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:03:01Z), 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/QZES81912847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc66c8207235e638490cf72e4a9d254acbadcd64d7d7155b3fa82fa9a0a1e33b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMPKX1882660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed769a3b0c4cb891ef47be42b6dd805d4ca19b155cf968846d1a88e9ec6149. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES6062068901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053b1730b452252ebdb76af4c0e0f2f6029905f2adfaa230ac02ace4672b0943. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ES6062070014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7d54171dab42e3169810e9c84faf6a2f0e72c52c7d2a67d50f63f2e7340653. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES6062070015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eb652e67fc007b9c0313d65923425c546ba150064b9af37983c704061e57ef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES6062070016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb506ca0022530b33e2d73bff494fa357d3131fdd0067634360bfb90690a93. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES6062070017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bf72fff1200479cef004a9f26b6989e0ff84eb7a601eeafaac4aa7775c910f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES6062176201.
Ivona (Voy a Decirle a Mi Madre Que la Quiero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09527fa12e0efb045700919d0f9e7e34995e1c4ac6a433963bf5e68dac1117b7. 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/ES6062178204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebb85dc1eec0106ea36b848b068228ac74121dd54075fad4eb43cd14a073441. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES6062178201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f50947c2a1b9102790c18c06c730fd5157197c234ddd73baeaf070c9dd4b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6062178202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41040a4205511a69e4a04c8dc4a05b78f4bbc3e3ce16a8c99967285b0d89799d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES6062178203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09527fa12e0efb045700919d0f9e7e34995e1c4ac6a433963bf5e68dac1117b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES6062178204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130a9eb57d4685e4ea3c453c7d1bae8e2de9fd498d555f195c4fede3ed47a198. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6062172901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9daf53aa38bad012ac6bb7029e997c5d927eb24d1afa4bcec99c3c067cdf06. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6062175201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d33a453b2d2139044ef7e5ac835bcfe8ba7a99344a1c82806de433de3f681. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6062178208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2580a7196c20119e8adf14152d52ee80bb4f763a9f0dafebb62727864e97314f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6062178209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3abc89de5bdc8a3bd5bde95618167d994f5f8fef055b2520855c8dea514d83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6062178210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bf72fff1200479cef004a9f26b6989e0ff84eb7a601eeafaac4aa7775c910f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6062176201.
Lo que yo te he querido (pretérito perfecto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936a8da597ba3ee69fc0acd5d5ee6483f4ca4cd42633fa131ad02dd39bf2164. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:37:22Z), 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/ES6062399101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437e99932e48b81b97ac2c36f4b2e75a8952da67945b038db52dd49d2d09d1e7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ES6062304401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39f62e445fe35a55da27bcd5029f0a483f60c6827ae1960c89fa814a0fb3f74. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6062422301.
Viaje De Estudios (Un Tributo a Lori Meyers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b90030adcb905735ef521fab1fd97bcccbe143928bd6947af2cbeedf50e8ee6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES6062535601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e2f9fb5da4d1feb3912601e606ec4b5f0183e42e1491914f04cdcb0a478862. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2401390.