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 0x6da9d3e39806c6f039321b9aea01cd36cd48247270588c7c13fe3d14d837295b. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57428304-7abe-4f7b-8eb3-cbf325071e76.json and https://artists.proofprofile.net/proofs/artist/57428304-7abe-4f7b-8eb3-cbf325071e76.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 0xd47d4858823a79450b2283851d32e89a73e09e5e33027650fbdb4b3b2c4ae87f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZFYX2026674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9215d8b0e5c2bc241f532a9d4f21657e510dde6f8bc72d32705062269bf0e811. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZFYX2026677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2629e1276a78ef95f4317b9a35b15e4b6299dc6a3236985100bc4a94a550cee. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEYOK1940193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc87a0de41372963611390634900db0c2d5d4f323bd85197f8b0787523d1b0b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEYOK1940195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623c68c3e7a857f74b96e18a9c27e907588e2b9efa7a33b98a5699e44fb58a3a. 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/SEYOK1940196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4b7790ed00f908f45d27c5763ed276151c94af1a7b96def46951a581f0c91d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/SEYOK1940197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109bd762511b9f51c3da1f6205bba042287ad0d8573880753b4c3c3549537ac. 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/SEYOK1940204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57416b7968b69df76509b9c2fc94073b59968ca15500e57607db6990264a7bda. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEYOK1911943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d452526d78e08473ac9fef03530d4c9a82aa44dfb0d250b3d851729575d9151. 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/SEYOK1860093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151ee572b3502770e2cda61bc9fe1f068310d37680f4a52a3a2982cb08477c75. 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/CAGOO2405760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b249af4638f004dcbfc060a25527a2d5aa59f67d4c16df0fbc677a50cd07c9. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/CAENV2452253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcc2c3736c5e42cc90f40fa7936bbf0293208a240a77a83dc353cdc16bd1fb0. 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/CACWV2481396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adf961f3871a37b60982ee4d986ed13fae979ae5bd75be0e85b2e93f65c14f4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CACWV2447866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cb983779bf5b2b9031c665f39e0f7d03f0605fe10a8e25b432ce7e21eecca3. 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/CAHQJ2485052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4d508af7b2f6d7d1e02b6ef24b47e66e437d7dd23d22a421fa5626519aa20b. 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/CAHQJ2454495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a707579f1a2c948d98e57db4feb8865b2cb477a640f4045104aa729ddf7f4d3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CAHQJ2419899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dd716fe5732468200d24de9d28151d0795ee78132b79c62960f1304e5e433e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CAGOO2371708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeda5e771b2e454ee70a1d820b77a1587b50bce6703563cccc78270458177a14. 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/CAGOO2324154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdf23ca1994c60571fbc2945274a0074c4d542939a8eb01312201131ab306f7. 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/CAENV2374353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062deaeca63843829daa1394814aebb669ab589bb114201523aef5061ed8253. 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/CAENV2346575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c12e64fda8004690867f035659876a83530e3fd71cbd24a7d4b95fb2b94168. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CAENV2327292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59a83b7589647f29e301262a216ba959691a01cdb8fa32772db230058b05476. 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/CAENV2301907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80049aca76d7cbfcea720e70989c05b9a34187c52b8250ce5944c9e356a8afa2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CACWV2356086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3631df023bbc725ffa44f538a6ca4be112bb823ea8bfa69b7860f306f5db77. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CACWV2332314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53977f887a54c5b8db76d6688dfd6f1b45513442594a61ed19d52a9089469ab0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CACWV2307855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c90c01aa6ad29fb95106bf43ee84427ec5c453d105cb225729d04df6b6407a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CAHQJ2383395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73557cbd43e4ef8650256f5914cd8c51e64490394c198450b0f18b5a9d6fad0. 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/CAHQJ2321915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359cf9ed912d73c30cb6e21d76583440bac690f92662261a9493892c55cc9ced. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAHQJ2323993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45227b3ddc4457e19696487a0c7f18dcf9ecf9c648f29ae1593fc51d5f23ea57. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAGOO2224807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868a2482dd938cc5086533e3a597ea383214846280edbfe2c6948c5bfa18aaa2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/CAENV2298113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ff663496a8b0c9d101d054023102b47c7991d4820692477ec988dda17b12b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZTAT2282357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826e7205908db9fe3eea69a553359055e12fd2cfc4376ff83d95ea62b297d49b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTAS2244726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa069d2d1d95ccdbe332b54e60469ee580566de65887caf8ccf5a28ef0bf4c02a. 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/QZNWT2203792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f674ff4a775a8b6a967c855be4322f94a2573db5db796831eefdb7d6680062. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWQ2252442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb36f3b70ebec9fa8f1d918097e19337b8cad067f7b8e851426c075a9758d0. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZMER2201491.