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 0xdf4d89238095dff1065c1827c15448ff432742dfcb0c3d5b70f9b1c1f2256426. 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/e390ca88-f49f-4b15-b4db-b042de349643.json and https://artists.proofprofile.net/proofs/artist/e390ca88-f49f-4b15-b4db-b042de349643.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 0x6141eeee99130f63974461b41512b65fcb8e7e5d8650f5af1e8d4db8ee77eea6. 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/QZAKB2012570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7afb3cd85021fe46d933871fbb2c01cb303753441360a0c6869f152d1195c3. 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/QZAKB2012571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd89563bfe27aaf9ad4940615e47afe9f6a0c20219b9b06dde70d10451f43c4. 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/QZAKB2012572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b29fecaa44cf84162490bd1b7d4c67d562e6959595c32671d68cfa422f53c36. 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/QZAKB2012573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef259411e6bed7130739e69cd25e99c42fca6954796561ff60f8ac626106c97b. 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/QZAKB2012574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841605cce3417fa225eb9f2abb021bb051686a84f08202875b3d5b1460f27505. 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/QZAKB2012575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c5c74b7aabb64e41e9e63c21565fd4dae9d2cebd437fc0c8dbb885bc593965. 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/QZAKB2012576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f3e42fe354cfc7474347c96ce9dbeba38ecba0f2e00e591121730591eaafff. 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/QZAKB2012577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e90dfd1de8fd2aee17df2192e73b501cb8334d631e8adac7d7309e4ebce2da1. 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/QZ8NH1903116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367070bcbce707f74e792e2cdd35e9ea636e0d232f667e426d4c77c91020674c. 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/QZ8NH1903121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf573db5b6b8cf979c4714c73026bd2e33f44a4aa14ec03ccea15bde48bc97310. 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/QZ8NH1903126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5b71fb5ea2b3fcfe5cec87de840b6870121a634997bf94fdcd64a0346703c4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ8NH1903171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8da82d63e6fbcfdbabccd0034ad7e3f575c9e7eec59ebf225fdd40d76f1b6e. 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/QZ8NH1910066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd521cd7922e3857ed911b772d190f78bc718908de90bc53950b32f919bbb7c1e. 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/QZ8NH1903136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d85ef09cffb871802aca861a02fa547f1f1dcb2e10ff1ced7ea829f2ea214. 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/QZ8NH1903156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f6c195ca354340f4d61053108802ec565cf329cbab0cd4ecc4ad5d5b0f0f70. 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/QZ8NH1903131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771172d0b2c8e91cbe03fd17c29aa3f04da2e79a5bb44ff250623a87a26b4c4e. 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/QZ8NH1903036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2fd3d2488019916af1a07334b1449e2c4548d0150e95c84aa111b6d56e89f2. 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/QZ8NH1903161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3c6b330af0a715e85e6498fa216f8a5b8c7aa7cfb5c27e30a6964bfad8be19. 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/USUM72311701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc86507992fcbf325fcd8f6e27b70d7a702582a8708532d345a995e1b8a530d. 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/USUM72310417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36daec11252efe9cf1f1556f0488de30e29cfc37b10134a5753cee4d24e7cb17. 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/USUM72311706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8c4319cbf9d31e4e77666ef5de1d646aa64a258074d7d690420aa70798653b. 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/USUM72311492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bec003ac4ef68e8ed732803e9721bf08e48513e2cc23ca998208f11034d52c3. 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/USUM72311708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6b6243acada1af65c94122818e7bbad5259d84553e59e2e0a35b010d267949. 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/USUM72311696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8c4319cbf9d31e4e77666ef5de1d646aa64a258074d7d690420aa70798653b. 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/USUM72311492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc86507992fcbf325fcd8f6e27b70d7a702582a8708532d345a995e1b8a530d. 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/USUM72310417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757a5cb96b23db0726b56351c559ff1a316e1e785d150d9eee3f61c76d900aa2. 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/AUMEV2367667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4867e96f53dee9f366856ce8bc90048fb5fa6d52348276381c6c6fad65af85. 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/USUM72300850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad2789577db416a781aeda37e411bf2bb0b4ddb07c99407bce996630a5a8ad4. 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/USA2P2205043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba42448d65d64b117ff8c0666a613e5b403a7fabb1d4ef2e7ee57f4641edb01. 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/USA2P2205045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaed5554cf69339022c68e5b74583bf808a6ac598198a91fc5322f822c8181d7. 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/USA2P2205044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659407e3f2ebc032bc7200f0071155c894acbb32c0c6b50c93e2b34406237b67. 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/QZSYP2128567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4f6c245d9a286854d94cd8cdd523ec71ca9541670ce65a8030f4914ba7546c. 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/QZS7J2159050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b6f8609e34920c3640107211c0b800fa975881c53baff3eef0dd7cafe8ed1. 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/QZQAY2115595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e526649abaff5d70c7b6de6dec729949b1f183c2d1c14e20c27e8421c37b1. 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/QZ8NH1903102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b841c4993b976502c97384b4931e4a825157df8e17a7fb569eb6f26da6b71. 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/QZ8NH1703020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd7bc2e0fefc72604f248edaed58473c0a3ede0b61f2433532719b7063302c7. 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/USUM72316398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b8de9e6e1561cb2911ecaf75f3f017418275f8636dfe268d45e07e7cb804ef. 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/QZZ8A2317845.