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 0x545825e4b0f6b7a3484dc1dd8edddc0bbca96f3081b2fd235bf89e9a5b03b3c2. 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/49b81640-3215-4326-b375-6fa616360481.json and https://artists.proofprofile.net/proofs/artist/49b81640-3215-4326-b375-6fa616360481.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 0xbe5bf48267fb5237c8a0ca7d2d0f47037ebd04ff02c075db3ecbfb381d49a38f. 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/USANG2282151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e7050e3f8624cd99574d47bbec10bdf152691f72fe21469f973856dd6c1a36. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS7J2244781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525a9aa42dfb8776bd754ffb1881a9a37179faa583e4c8b3b3054b94a4166ce8. 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/GB8KE2409872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5682f000b84ee8b59f3b8621de80599af0b650784f15096319cf7d1c7aaa98f1. 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/GB8KE2409874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65a8d55ca56f51fba77c3084aa6e741c892015a16f22d89f39fd76f92a74594. 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/US3DF2452828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592eca8c882e9467e0ba1df51255bc8b4ec606bf7eb9286b217aa57d6af5fed. 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/GB8KE2407169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f6ee05371a309c26642b13309c7f7ef3088df2cd843ffa1f0f4c2c7ae29ed4. 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/GB8KE2407170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fa5d5b922f89db5cd7d285da70bfbd7a9f786aa066a05797f9aebbaedbf978. 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/US3DF2424413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c64ae900c5128fd56fe4b7b744f8dbdf0b1d5d8b2eeb3ca3f089f977a37e1. 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/US3DF2424405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005a110ae6337fc1ab4f5fc00194f781740f477139604009bde5b7d1f9979673. 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/US3DF2424400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f92e8ddeec3138e68645897a453385c73f83a3a9dd8313c6e371f669212654. 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/QZTBE2312049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f8ce4302f66afc81b14186d4bf2a2356fd295c13372cc96a7a90362e9b3a39. 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/QMANG2212639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28f07d30b3588769e60fdbc8a786dc3ab092a3b2189f16537da2fd9f3387e4. 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/QMDA72362013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286625444c77acd14d4c2b4011ee307aea47c68c00b3cd39eb9ec63203d53167. 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/NZPB12301880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf5f4d861443c2fb9f64baaf393015d4cc2f57df15daf6817050d0cafbbf391. 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/NZPB12301305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0774eec899aee03fe742809a364e195155358edd4064bf7c721dba77b5b59623. 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/GB8KE2418577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d7eae8c0c932b9f3713c14f46c009afaa54bbce9816e761d3e40c3a0eda8ce. 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/GB8KE2418574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6aaa54c5b11c252e3c9e3d5c4b7d3c3fa023be9a79ce5b86040160cd4f041. 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/GB8KE2418576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28da7a54cf3fd8cb76602b949870184797a8be3813da9e761096ecd18dbef42a. 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/GBKQU2511149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a3a5741eb326ad15fd7eea6e246c213346cdeded522ae4f79aab858c087a2. 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/GB8KE2427406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e7050e3f8624cd99574d47bbec10bdf152691f72fe21469f973856dd6c1a36. 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/QZS7J2244781.