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 0x4426840c8ad8c5788c278ecbf198ef8b62829f39e22262b0df016ab769c21373. 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/00480a2d-6fff-455e-818f-d55072e80885.json and https://artists.proofprofile.net/proofs/artist/00480a2d-6fff-455e-818f-d55072e80885.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 0x050e4ba9da0d0446719bd569cb6afe0b08f49af506d31e73b0d14809a85c59df. 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/USHM92000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0150116c3665f26a6e9dc85cac5256374d5e4030d4de6f7a78fca9ff55f263e9. 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/USHM92034146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186288fb31e42b19014d5e6e86191693f1a4817a7938df2946538e256b784325. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4R2089053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c3ce6b9d3c796756ad9e8197b1e54609854f3910f69772cc69dd2d5152e35c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USL4R2089054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54069ec0310eb1ea83011a517e05c6a7a42e19f38cf7fe2b0fb5ed2ccfd8e81. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/USL4R2089055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea4095270e68ecf98811930e97c454d0fc59aca2c8ddf075847e4c0cb84a601. 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/USL4R2089056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8befeb578be491092f1eaaf85bbe2260080dc5a8634e4bc7748c5e0d5be385c. 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/USL4R2089057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299827d2cc79171938015d3e8a3ba92bf91cff24492a2e62b21727d60edc1621. 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/USDY42107461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1069aa16bc8835dd77d39995b767c17cca270363ce183156221ca286072db6fa. 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/USHM22178177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343ba952210d08f38632454d8138328f2c7cb869cf296214466011dfa67811c6. 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/USHM82177450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d37530be4b5cf5c2b310219203cb9a4354f543d44e609dc9e4f0406816ad5f7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM92107646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda479717e9b34e41585dad262c067989714646856017d6cd37d05bc650df302c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USHM92162779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0914e2fbcb92e06911efb89c14e9eac3706a1b268033c9117e1745ad7233c857. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2133678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef59dfc695e90a41e3c07f42b458b383b59d8b8739419720b5f9c1e55911e10. 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/MXUM72300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fab8e9c2af3f31d9086293a533eca38c1a5fbba6ede45e0a5e432d2ff2b5cc2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/MXUM72403616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d357599356e5988b6514f7709fd3d3d1625f2d71b312a16dae3a475bfa09cf. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/MXUM72500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e9ee5b7b925e6d2ffc76b88cd6115c64bb320a5a3d5adcb6dd291759e17273. 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/MXUM72500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a190c71aa690668997a943f75a1abc5b82db88493e38602fa10b708e60c037. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USP6L2302137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c63a0c03f180080fbaec59eee4a54954cab4f1a160c8deae413c0fb0b91363d. 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/MXUM72201635.