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 0xed7a35be344f975593b24f597ee7ee7543fe16414bf3448e5d2ec6ae35ad9652. 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/ff08a715-8249-4771-9e69-7e00c415658a.json and https://artists.proofprofile.net/proofs/artist/ff08a715-8249-4771-9e69-7e00c415658a.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 0x35982daa79a1ebd4ea363f8b89f37e7b3d3b76371352ec6cbe1f639eb6f94294. 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/QZDPF1800490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c966c0e7508c0c9a01e659b1400e7538284c579832af9c3e76d98dccd29eb39. 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/GBKPL1954320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcace5ce80153efe705db8806a656df7ac8497651d1d39a46652637cdb03115. 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/QZHN42081676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ad75874d5dbafd6000c86fb908b901d8552034feb9dea3382f760bddf7b69. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNWQ2189588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcace5ce80153efe705db8806a656df7ac8497651d1d39a46652637cdb03115. 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/QZHN42081676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ad75874d5dbafd6000c86fb908b901d8552034feb9dea3382f760bddf7b69. 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/QZNWQ2189588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e7649f739463666302b0c70aaec94281b5f8088e4e07c84f4aa3cedabfd1f. 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/QZK6G2094456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228945eeacbe2ecfd30692c5fe86d2fdcaf0e4535d0c03a54fd7cd3a537ab223. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZES62244064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a8ae181903a77e34e96be3caa71e9c23e57c40c1d4ca7da301dd2b643f725d. 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/QZTAZ2231464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb6477fd76a70fcdd087b8a38fa3afffd8d32c75557e7f22852ab1b08c1d4e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTB22294021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4a3c21b6aea8a71752a1e6f68491e747335e555332d1ddf0c224c5efd3c8df. 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/QZNWR2017707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5295b165ea1ed021e5686f3c0d2bbbdd40527fcd74ae61a68abf1e304b709b. 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/QZTB22294022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8936652ffa0570e2db1e3427cd5a27c056fdd4f5dab046b8a8a0ab9d4c83d4. 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/QZFYZ2172738.
cap.vi. La Paradoja del Rey y el Matamoscas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccad252ad6c8e304cf2399f9e7d5be4d01e8418834b584f130f4353abd8ba97. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFZ22586983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8bb505216debabbd61cf5fc35ef0b87eb0ba731be374b9376c058a517d57eb. 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/QZNWZ2504376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a75344e8bb821e092f48eefcd5aa082f9a1992df28eef1b66ce3f21f8678f10. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTAZ2570926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928fd309443db3027916ee362a8d8a957b7d8810a7b5c296f1b44c22afed4c8a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEYOK1844697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d80ad6292306a7fbb5e4b53a84e0b99be7d634bc1e6085c5577d10adfc304b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFYZ2139280.