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 0x57450f2c4da9a0af869cf59a9e6cf1ede6365f925fac7b2ec487034457a5d258. 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/6ff63871-ae42-4ffd-b9a2-8ab6a80dfc18.json and https://artists.proofprofile.net/proofs/artist/6ff63871-ae42-4ffd-b9a2-8ab6a80dfc18.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 0x101efb5f311c6dbddff10f434304ccb721763b524e2576fe102dd1cbf5145ab3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM2PV1865758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9175e81f016ce40bd624e044de1e1b31dcc25a40a42dd821ec6d8150c1ee5ff. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZES61991298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94cb12511068d5fdf8e8d2a6c88fdb2eb7e4a2d4775676b21df12cae98fe4a. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GBLFP2043635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec7cc0f6691647f100dc3e4c5e5753944bb80a518f272dd34872322263696c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBLFP2043632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d59ba76baa9a69ad2db61661e483c153afbd3a43a4da6ac2d0b26e07352d6cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLFP2043631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec7cc0f6691647f100dc3e4c5e5753944bb80a518f272dd34872322263696c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBLFP2043632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16704afe0f79c208426aae1484f514ceb2d7f4e4573e28a063c35a8f0e10431c. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/GX53U2072303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8972f1572efe1c6b5d585fc2cc52db8824ab99a720296c5696762b0a423975d. 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/UKXN22217073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71fe1f5dee424a86a557664cd3ba70aa502cdb344b74529fcffc32ad5ecbf61. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX3Q92353029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c398d492abe944104d567780e8f1c4859624a5e2808f0b3f9fdefd7bc13aa4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:57Z), 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/GBLFP2302472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f04128a4d26177c4317ff01bac98507faac8b9409ae2a8eb1d2425f7c0e64ed. 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/COAF42392169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baaf258c5285e0e9177042e4c0b5fe5e93324d296cb6d6e0184fdda82dad732. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/COAF42495361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50889eb971c1b8099f6f14e792fb58f61ad41d5c9ffd031e0f40ba300898e011. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COAF42502760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2bec632d5c72f703efbe8c904ebd052b26da02fde998a5b73a14367dfa6fd3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/COAF42502258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd02e3bb315c90c831124180c31a432416bd3ab4e950a8145697be94c648367f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:17Z), 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/COAF42504506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9c03a660661fde875931f4f273cbff79fa3748b262bdbf3513ebc337142a01. 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/COAF42505504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71506fabf41c97ea3501f81a39040075c234a9e9725c0f38e17b5940a7be9e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2330515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71506fabf41c97ea3501f81a39040075c234a9e9725c0f38e17b5940a7be9e4. 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/USA2P2330515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f00bb63cf03da69f5924b8b49fc8641d4996ac863fbecf7528d740e2e0e4f8. 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/UKXN22232808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9763ec39ae14e0eed286feaa9f58e8b7bda4b38854867253c3fadf92d202a49. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNJY2420756.
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 0x3e6636d45f546912528171965c3d886dc2fe7f992c5b7c9e1eb139671922a95f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLFP2499549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff6fb394c730ac9fdd61e514b1caa3bf4fde3399d3286d0a492640445dd9408. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBLFP2499554.