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 0x457b6d46ef7ab79800c8d361d93ca75afb6855ec7df2db920d8fa9ecac448883. 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/4847e8e7-8037-4ef7-8a58-a83324c5eb01.json and https://artists.proofprofile.net/proofs/artist/4847e8e7-8037-4ef7-8a58-a83324c5eb01.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 0xe003b5a797a7898e8e78c1a7e9088096296220971e80a9b60244999b8e0e75a4. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBCEL0800460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3976453390e512a2cbb17cd7155ea248d07cdb024dd1951c401b0c7f9f7efe02. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBCEL0800463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303859ac8d03dea1c70f33b47c64932630372181cd54014d67cc8e9631d93e32. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBCEL0800469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dd8b748a40457a632be4018c37e5a08dac77e83c8e8d937a986654121df3e8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBCEL1200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0104303b4fd05cb151baa94749690f94f405cf379eed78740915bccaec980857. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US58L0806505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64edde5e0a0a38b322dc2416ba8563bd7da1fb4be5b655a20865b7fded969700. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US58L0806510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e134070548458b982ee740ec8f63d634db2d6d49458d2ef85b8e27e8ad8ecd2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBCEL0800432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b202d5b46dc7e4a2e9366fb9b9a2cb3ca3c78f897c2024ad760db69692c0291. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBCEL0800434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ac196143c535bac36b95315645299380d953f7225ae13ab2ed14c0f51dc993. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBCEL0800435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e85c5c3115f871c7b9b3dc520c35f6d23137299dd6af8aff362f179dfc1fd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBCEL0800436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a2e74a6f079ea53fa6165ab588f3a4f0fc591bad3c391dd42aabc95e12482e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBCEL0800438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fa5bc43d2cf0f7bca71a93d1620f77cfb959ad54827f442be1c246dc5a57e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBCEL0800439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d9d2e614c5838c4dde68db96ae74793b967295e794f123598f7e8cb410727. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GBCEL0800440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45e72239fd75fe922716e85fae3562b6989ac17b26dfe4d4576727e8f036f07. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US58L0511002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8e51d9fbd73363f47a7c4327bf6db415fd335d03052f898a3972cb352db428. 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/US58L0511003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434b0c75c00431e799e7485b9dd6e640759811106f098a258781e43f849b76c1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US58L0511004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe876af5ea571be75c7961c7a86b0a082e32b9443bf06de8c6f79ce6cf5843b46. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US58L0511005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423e57dc0a6e7c76467fc778a33c6bc50b9362a7c939d76f26387e97d83b60d1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US58L0511006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2236f34f55a84ab8428724ecbbfe660e7577032bdfb1b146cf11141f02a086fa. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/US58L0511008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aadf80116803adea4b3830359e1a582b6e639be5aa721ef61a962546420a06. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US58L0511010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c32244f6f505584c1316ae2f183fcc7a5a45605cd922be41379d0b5dea7e7ae. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US58L0511012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed9b882dca8569fad1ca9593d936dfc090f9c2eea5c2f0876230028eef942b1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US58L0511014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704b09cb42a2ceb389e157094e1770e885da701ef2ca958e834fd5d33b64990a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/US58L0511015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f371efb1fb6d11b5519cf015646bba556d0d9b2668728f45dfc23907a4118d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBCEL1200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e25d83b9c883576a66e015ee27b50dbaeb3262a030ef777a1088a35c372f7c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GBCEL1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0929778e8b9d2dc40c3f230f11e80e1de3e083aea0c83b8fa01df6673b0aaa4f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBCEL1200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1afad745d80d91d54329fe1496e862e97391e6eea67c956ccd32c5c8c4aa134. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBCEL1200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3665da7c6e177f5bf678dfa1b78c90ab6550c718486f78aef5deb99882732d5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBCEL1200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8496fb0799f5de170e16e3b5e2c51379d993849028ca2df42d0b8e6792456c9a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBCEL1200037.