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 0xd94058d9eeefcb0614cafce2e62467133eaaead7c80c246d48798e38e192875b. 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/1c484e91-a2e4-4ce3-86bd-7bbda3f2d498.json and https://artists.proofprofile.net/proofs/artist/1c484e91-a2e4-4ce3-86bd-7bbda3f2d498.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 0xcc6a54bc830cd005e30a75985b59847545c75fa0a404d6078a7687eedc2a3d3d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ARZ7U0200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f776ec710eabd9d41f93eedc43f8e0157ac8babf6e6fa71234c9eff277a9749. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ART0G1209365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad6ccf9300687f248c91870b0ee068c253be3dff17fea3b85c58863cef9e15. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ART0G1209367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b682f0b9e93a30f6343a8bb261a217b8cbd374f8db5d8847abe9f218892f51. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/ART0G1209369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c33cad50cc2b5c9fc936a64d2a96226316522392048bd195eb2ee4638bbfb. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/ART0G1209370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad6ccf9300687f248c91870b0ee068c253be3dff17fea3b85c58863cef9e15. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ART0G1209367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c33cad50cc2b5c9fc936a64d2a96226316522392048bd195eb2ee4638bbfb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ART0G1209370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117fc0d40ee3e017f816f1d8080a3d835c535fafad908dfa7cf06c876c158018. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ARZ7U1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd46c8015ce064b7a83f619c90b2172e114f09b3f77fbd4006fd30e06dfe20b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARZ7U1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117fc0d40ee3e017f816f1d8080a3d835c535fafad908dfa7cf06c876c158018. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/ARZ7U1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd46c8015ce064b7a83f619c90b2172e114f09b3f77fbd4006fd30e06dfe20b. 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/ARZ7U1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56fcdff28ba196c92121e492c6b381b0a9acba33dc29443fd882853bc3f32e3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM7282185793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6b0bb4c1fd57d25bea3727bc49cc084c6811bf06c5c68f8f551c6c50ca1b1e. 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/QM7282185794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aa6e431c2f141910ae440fef5bd3f8fd52a64088dffb768ada80bb3c338800. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM7282185798.
Viejo Ciego (feat. Antonio Agri & Esteban Morgado) [En Directo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109cfe986a13dbc11741bbf2ac2e2160817a132d0b268c806d9c411071ce0c34. 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/US6R21344788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b6793684ff8e7a5935bc6d1d2f455fb257a93a7995241573e5d1ae42e981a. 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/US6R21333380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d26a973a2ff94869e9732ffcc4f7cdf05d097db31380c3d3c00bb6cfbd582f. 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/US6R21333443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e5d73609a68e259caf5426fa0ad481ae92438eb6b431c54fd91e4ee03efd1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US6R21505077.