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 0xf77f6d5b94c26c0775f2c01646d71034912362e1e41228ee83e7d89437c52590. 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/e1f4d8f9-6016-4f69-8aae-6cce5bb82e42.json and https://artists.proofprofile.net/proofs/artist/e1f4d8f9-6016-4f69-8aae-6cce5bb82e42.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 0x3fb171486fca5263d88acba56ae58b5cb9be43feb9d91d2a94d160d9e92554a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2302529.
Na' más que disgustos (VI. Cosas de hombres)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af3c0388dacb7c93ac22aa92b8b00d0a2ffad1c3c9e8fe169fd514d4bf79ea0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:55:27Z), 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/ES71G2307912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb141b24dcc09da36d12e04353ccc9d473d18b39506e25c9ddcef6f755c3544e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2314771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c7ed6ed0a6249987f6c46cbaa85be217b441e4212e2d2e4f0de9534bd8a0ea. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:11:07Z), 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/ES71G2320906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80692e4c589b5775d8137362462356d52360795d299b6f34a28fd05b47fba7d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2320908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74777fa1f816c80cc9b95209160a33fdfb8c682da946fba4a31cd3657930cab4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:11Z), 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/ES71G2336976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe083210c81d65812cb86926aec92cbec688c1249a9cbdd46d8524b48e0c37e5d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:09:19Z), 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/ES71G2336977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761969b0aea3535c8721bdf69ed34b87a1f3fa75ebbec114f109d9a77387437f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ES71G2336978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97dca2b88f6dff6065df227088ce712cf0ed75d2a2f5874bc7566d30d4d3fa2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G2336980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697066c9797bd56a3c7f8e5a7f094c362d96432cdf7b84c03b777f32440f1e7e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G2336982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1d168c95db39fc2158277f8d9921820397c2193f5c1f0cfa3dee2d970f5365. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ES71G2415358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4a4113bcce21441fbebc9a6ea523c4d79d6e099f12dee417785c51db9751b. 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/ES71G2424133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea94279ff2d56731d90641bf6c268e84c22706b95d1f8b23b18cfd47f9681c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6N22565880.