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 0x745317cca7dcd08c3ce86ce70602527c45b231601642f4a1d736311fad52b3b4. 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/173cb818-196f-48bd-833c-dd6deae7c9be.json and https://artists.proofprofile.net/proofs/artist/173cb818-196f-48bd-833c-dd6deae7c9be.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 0x66d826d81da68f11a95a41cf0df52a3ef0fa5bb23edb6ba5b4e9694edc41bc75. 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/UKGV82300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053be5757796a022eeb491b2c66f058036f7c33171d0f56ede8de30c3900ae0. 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/UKGV82300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d825a6748904310d4b1d602440cd593ca63c7e4030664868f1caf743a14f918. 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/UKGV82300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c90a641e76698a954ab90031cd97e4c9eac250c0a2e4d45f173c4bf1498c63c. 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/UKGV82300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e082e4a9b6f94ce7dba55f0e8d464dcaecc57ddce3878d36790cf16e76fb583. 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/UKGV82300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869f8b798a4116f00df5a2c083b08b000e7bfce5988664c3f4ef85a7b088e6de. 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/UKGV82000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5359b291dce8eb124039ec682369b83ae63558498089ffc8dc7e5ca0aa24982f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:40:53Z), 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/UKGV82000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1897a8d7b481030fc5af0b939b029a409495167a03aa05a17ca59066ebd1d5eb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/UKGV82000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550df83d326bb44218f69134372580f52dc70d9ca2e36ce523ea067c5079b01. 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/UKGV82000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb453418da995fcfc7f20cf024540e143b93cb33b477c95000a349dce20ed9459. 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/UKGV81800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8224ae98448c3ccb99ae69b666cfb761a2f4687b51f9d0a2e39de0cebfc4fc. 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/UKGV81800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc942b94b96dbfb18f94de791f6e19c97a7c82b3cc2fa82b2c65e19da9ca2b80. 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/UKGV81800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc652cf078c16a7232ac1c9e72af7458fc57651441d55e2621bcd018ed5f4ae8d. 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/UKGV81800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7481a7f7a3aeb3c3b469c29195a2415839be8855d31e65a1f2d924852e11fc4d. 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/UKGV81800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858199622a6ebe9d6e2b5c9eacafe8f3b8fc2a21774baa8081a4da04914a5a1f. 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/GBLFP1611800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de29f0b1e135304b69d566e706af5eb011a8a7f86d222e3df4ff056ce9ec81. 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/GBLFP1611795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc72f79fb00cf089c73b797e6a7d04fce4dc3655d9c01650bd09c8e39d5ae29b. 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/UKGV82100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9769fe5ef8c94a35ccb3b30b9282799e22f14fc946cce3233c3b59fca76bcabc. 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/UKGV81900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507f3ef782cf571ddd76cbcffd9cad27cfb243e5326694a940513b70dcdfcdae. 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/UKGV81800054.