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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf208d523a80c3deb482b7a5e7f906a8a37009d8b0d40fddb39217a04977da952. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a22946f1-27da-4723-8780-a7b7d5e48bdc.json and https://artists.proofprofile.net/proofs/artist/a22946f1-27da-4723-8780-a7b7d5e48bdc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9389bdbbd0e6f2d6fa632d8bbe36b4c85a6c2f4aec2cc8be5976956656087f62. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR59R2460434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67b98e8dc25ceb300d67ddf5245bf6728189abfedefbad192e4af67eaee256. 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/FR59R2451973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6c022b6ec8d1137b4572a69902dd902da8cde8460134e7b4e913a0fbcbf58d. 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/FR59R2451974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb032ac26266d79d169d29a13829617e92c0f7b6f7c17219f278a63f3f2637272. 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/FR59R2451975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e626a13c1904614017893610373e6886c1e5a0d656e091cc6e6563ccf799b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R2451976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb02c963137deb958aef1b6d65c89918c4172ec93e13404a90a6e9dcec01322. 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/FR59R2451972.
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 0x68dace79bbfc8ea8aba41308a2994e57a17caec823a73fdc42b9a32287945a27. 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/DGA0P2464711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280b875e3d17d815f1063ba638be0ffa1b23997944358f9ebdf2b0d38d8e1f3e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0P2464712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf64120e5bfe43679f08dca07661e57f7238399833e2715cf7c0dee974530e62. 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/FR59R2547365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc24cf52f52ba804f1371bd518ec8a8ac6f2ff7a01d7e33455933fbfcf50cc. 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/FR59R2547366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc890095564033d022685d704ff809dc309206bfd3573efa75627459a409f0dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R2547367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52983d69bcebbd6ed63e136433833202c0ec5ee412ed5058ae5b1d914ab91770. 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/FR59R2547368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3abf1bf912931ffe2bfa37c28ba56f30e14ade26b3289377b0127a69c6d8a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R2547370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97401ea9ff914ed7e66999798a1330307dadd92f3a142214f1e26bbf9176c498. 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/FR59R2547371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cce2e8fc4ab67468586748cebf5715d4cab0ade64909a38502f4b10bd90e7d8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R2547372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24116d793da629df08b7b09a1768ef86a22999d3ead9e8177606d0432cb15bdd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2547373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e937e66d3884390f8150644557a9067cf06cc7ec728f56ef6847b3a554bcea8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2547374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4691f161ea047647000c43fead52fe970fcf7789fbfe40f5c1e4993f3e12e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R2547375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980939e57c50256d524a7510caaa51b4f35a57fef927ad644dd9759e71ad0b41. 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/FR59R2547326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a78e500285219019a724cc918ab17a244bb782b321850dd8e1f7461c37aee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2547327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d3ea02a5becde82fa980be019e0c7be87e4da910f2582556b7f954bdde3dce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2547330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0df4a7371e48edd66b84f8c2dca69424a613c3e7624167c3f49b3f01c6e70a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R2544336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de152595f5ec3dc227adc7abc43d1473f85a0215308b2b3adea65f8bf52bf3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R2544345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8cfc61f3037c5931d529324d6782caad1b94dd6ff8c8bd08d0898ef7b5f75. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR59R2544342.