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 0xbb410ef678ced6557d144c536a7cfb9a06f3e1afceaac8055ae324720408b9ca. 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/9a78e073-588c-4d50-bc17-45b6d105e4af.json and https://artists.proofprofile.net/proofs/artist/9a78e073-588c-4d50-bc17-45b6d105e4af.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 0x6c52558e71c89a099602bf56d3e54d18b9b556d769652ca0c90b755452cf6615. 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/DEUM72003919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbd3a2777e3ebb0384a353321f9f3593ba109a4fb3ecb5a5af5d9fe90206257. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM72004388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c52558e71c89a099602bf56d3e54d18b9b556d769652ca0c90b755452cf6615. 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/DEUM72003919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8dfd7c28e99cf03abfd3d865009503fad05e090b85c8a67925d2b12ac86aa9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM72003923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a1418fc36197203592ee69e49144a0c5f05ca9c3ec384c426e1b474dd7c339. 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/DEUM72003922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6003aaa7f113f25b65336c4a3c0251be4629931eaff822e891100d568146f541. 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/DEUM72004387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2ad1272d3dfc7e26ce89d9013004e98d0fe93b839c9f2046133e99011b321e. 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/DEUM72003920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbd3a2777e3ebb0384a353321f9f3593ba109a4fb3ecb5a5af5d9fe90206257. 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/DEUM72004388.
La La La io non ti amo non mi ami Aha Aha Aha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb7aded2a824da72682a0ae1e346a2c57eba1b05c4aeb6b412758b4351cb176. 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/DEUM72004389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e454a833fc01a9fbfcc5251c6700c5ca9bf1cc17c60adcbe93e0194b51e551. 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/DEUM72004390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aadcef4569cc107b4984ea391b3fccad22dad4fc8fd9bdc9afd9b3249aaf613. 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/DEUM72004391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbf12ef1d69bf00d5c0930f88447cc0266de2b5184b3e256fe740439d605793. 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/DEUM72004392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a924cbedf6ca2825a95357edddd1c7d461869479561ff92f21ed47395608c6. 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/DEUM72006518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e5c48b9f0bdf6040fb51fffecfa486d3c67a8ab500cb712b157ab84114ed7. 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/DEUM72007057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b461c4e53b90286444b487368ab3551a0e8ab65d322e6184e19a2b0fa14588b. 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/DEUM72202191.
Cavaliere d’argento - CiaoMarcoCiao-Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7ee1262f4299093435d6b3d4c6046f86a34b7a0bd638e4c5aecbc9249b720e. 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/DEUM72201297.
Cavaliere d’argento - CiaoMarcoCiao-Version-Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0979dcdbd87f3addbc39d225b2e6fdb95594eaa8cc10e10cad9134f9b9089e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEUM72201298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1254b4155022ba4b470bad8c8720a6f06e5ae4430e3c403dd984ea848a83f8b9. 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/DEUM72300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0113dd3b5248ebb83abacea78478645040d4a4713e043de2a24ce2ba30fed64. 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/DEUM72300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b461c4e53b90286444b487368ab3551a0e8ab65d322e6184e19a2b0fa14588b. 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/DEUM72202191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d3ecc4e812a41226c8a91381336293ca55b4fa4973e00374ab0123d79a32a1. 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/DEUM72300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f131b2214a40ae2a1a884d3ba44c89cfa21fba2d0d42115d5cb88d9b089310. 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/DEUM72300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e53aa0a0b0ed2e09c30ebe328453645fbc9d53e330e4ba56c63bd31e65ca6bf. 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/DEUM72300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1254b4155022ba4b470bad8c8720a6f06e5ae4430e3c403dd984ea848a83f8b9. 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/DEUM72300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc616fbac2b612513113d0951d3bd722c9f77850d3f87b6c7cec16eccf73c23e8. 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/DEUM72300482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1061af45a16cda302128a58f26629b9276b4692ec24b298ec1cbd32207b75f45. 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/DEUM72300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb535c9a3811c16704c467a6e45bb9647063708da0d17b412672349fb725c8d. 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/DEUM72300484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0cfb7cbd1ce2ed9c27bcdc03ab9e2017fcd1af435381d7c299e6976382463. 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/DEUM72300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0113dd3b5248ebb83abacea78478645040d4a4713e043de2a24ce2ba30fed64. 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/DEUM72300486.
Tutto grigio (Live at New Fall Festival, Düsseldorf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1774854296d566b17f84dc895bc2092f3982990e045453bb2aba10e09a84c7f5. 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/DEUM72413706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b2cfe9d573273d025da0dd665981c0e97c88c8716ce08ae459a29de048ebc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEUM72412892.
Emanuela (Giu Le Mani) [Protopapa Remix]