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 0x62925faf809336bac6fe1acb690e5d1b36eb3df9e86cb0ae0763f5c27ba1b87f. 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/ad71cfdb-d62f-448d-bd20-d65e74ace8cc.json and https://artists.proofprofile.net/proofs/artist/ad71cfdb-d62f-448d-bd20-d65e74ace8cc.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 0x766e953a5d3f97066f37e3e1a8a562419381a2e53ca22b8aab1b953f7b6dd362. 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/CH6542030209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace54915fb03d514e27c420271db101759deed584a2629fde40459e0baeaac01. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/CH6542030208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4378489321c154c72116fcd35dbadc16042242339828dd0069b3ef4413836d0. 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/CH6542030207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd988f6e0f4701c6750a6f3c5d7fae957ad35aa1e7041cfee06500310e6be3e1e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CH6542030206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254705675ffe4c7f78a70e62a79c1c73dee3641f99d4e221181ca860c92f6780. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH6542030205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa017bbd55260cf4346d5fb491384257f836702f19d7211517b106ec62d20b291. 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/CH6542030204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc697d3a99154ded13d02ddac5111b62da7978b8d982f21996ca93f12d9de82. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CH6542030203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc022dac59f1f22b06642cc468e934c533888d132cfdb5e5043a47df1fa40c25b. 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/CH6542030202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac590a6884bcf6dfc8e15d3eddacbc50706e0cee0475169dc00c4982c9f6219b. 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/CH6542030171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33177bffc4290b6f8d649e8ded6c8830c1632433a4305e4c574950d5b9a35371. 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/QZHN52384629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb77d25a68cf28a83a50120ca6ff869d981612245bf09494cf628d8680e72e. 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/QZHN52384630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf97330f1ad6629ba13bc92855cc7b79c305f4d56af532c5e5e6ca6d22a247e. 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/QZHN52384631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a90279bda1e92ff52150fa6e6bfd73f6c0195acd9e1786a3ebfbf33f2d8efa. 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/QZHN52384632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e061567434c706d8e200922225f50bd69c4565aef7c3121b14ffdf3d7824971. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZHN52384633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6febdc47c5db532688adf5d3ac5cb34135f8745681065dd8e9ed8f33935c03ce. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHN52384634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995911ac010de5f11ee831e13b8db469ff44a1fda424de285e4747db3ecfc8a9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHN52384635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aa968af61bdea1d8e1a7dc9982d2ccba69ee8f8239961c65a14ef642798a40. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN52384636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e008005ea987c388a2e20327bfc1da704ee8549d1cf596e58eee1f31c26c7f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN52384637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc4fa8dcbe1032ef11dab2a35e4f44dc7862a753ea817e9a0d7c71fcdc33ab7. 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/QZHN52384638.