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 0x2d78836d43091d624f1dbb84cdab3d8e2bfd3aafe64148b3b7de6bd43cfaab37. 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/b6a720bd-690b-44df-9ee3-648b2d50b587.json and https://artists.proofprofile.net/proofs/artist/b6a720bd-690b-44df-9ee3-648b2d50b587.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 0xeb50c44ab51edce4bdf684f1ad88a4d0c7eaf3d2d0bc8c01a9ed77e4a2be6314. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX3Q92007417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84f2bb8a11861b1061319ae917e229f7476bd2ac12ae79fddc23ad10b11442a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX3Q92007427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40ed611fc9a40b8c45e0a85aab61bc65d563b777d70a5a94b1218bb08ac3511. 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/GBLFP2333823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93817a7492391c2e18f85f98912da04026ac7113c76155ddd8f8de0c878ca41c. 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/GBLFP2452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7701536d084695693588f3a56da2d02caef31569dc8d4bbd13173a832974f9b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBMA22377779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a96702364cca527301841203681b80f6ed467dda6dea93869e3aeabbd1f72de. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX53U2323801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e96791073a59bcc6f850e24eef5e82d6db8154f2a7763e76908e614791273a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GX53U2323802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29f0896756038773cba154f8cf3f147456fa178544fbfe2d0a4c5af679b62e. 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/GX53U2323803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6718541137f488f65812088750cb8df2c021e61847d6f43908c0bbec4a54b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBMA22473591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c1171afbcb6b98cf31c6bab47a943b417f0e11b201d72ea873392614694de5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX53U2323804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaee7e44bd71aa546f3df6ae4e420b9d06f1116a02eac6db7f57977a6a02796. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GX53U2323805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e880fd37e55212d01311fa9722c228870b50d73c640a8bf7907e2387e32535. 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/GX53U2323806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326c6a9518d176a1ffabf8a4d178cc54fddaac9f95a6fa246432198b6343d0e3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GX53U2323807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7a73afadc57c1adc0dc4811449503898b81a8a9da9fe7874740ebdd046db63. 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/GBMA22351527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7701536d084695693588f3a56da2d02caef31569dc8d4bbd13173a832974f9b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBMA22377779.
Raíz Spinetta - Versiones Folkloricas, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60a3cf47d812546b0c1119a58a38b27a45d0caf72a3453950bb83cfc3164b3. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ARF391401543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a9787196b65696644f922d004e0e99016be77593af199fad33078594729073. 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/TCAJM2566089.