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 0x3954f7b0e9315cc99254ff9b22244168a65b36386ff289a4d6fc15417e13f9d0. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c164e5c8-b6b2-4d72-86e3-1c20c5608f44.json and https://artists.proofprofile.net/proofs/artist/c164e5c8-b6b2-4d72-86e3-1c20c5608f44.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 0x383f1ec86cddd0590470c462b440fbc82dface38b5e34088fcd637432320a503. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAHE2398520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56134474c856823a196202d2526f654ce61638a47e1ea8fda6b088946b8f3dcc. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAHJ2308376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d0c3a167eaf03d9d7ab29599105c8a875f35b43b5e700a1b1a94bfbeb50c5d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHP2308474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2afb91692bae668fd047d1df3265e4a02e2eda830bd4fbd8be952288021bd1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHQ2342614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa7dcc7551c151d31f4dd427f3230058064f232b305071df84c22375ced14ea. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAHQ2342618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58e8ebe7fab3792fe32d109de6ac4f8bd523d1dee1137398b58d448933f5fbd. 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/TCAHQ2342623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe895fce10cd1a1dc9860af1d5a43a26f813585c599f387f40d826ccb9239a6a3. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAHQ2342629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a19dc5213448ab185b750d0a80a9ec663ced0642122f430c3f9c47cf6e8b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHQ2342670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac090ac78305e548a6de287dc5496790994edbe859b27a374b68ebd3435569f1. 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/TCAHQ2342695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2b9ffc328cc4162ee3a6968ff9a73ecd66802022e7b3670cabac96f9dc6e37. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHQ2342713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b2d18975204a45268c2d02415942f97ffc929b0219d1a3547b52a756fc360b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHQ2342722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde0a180e92952b4897e434f7f7b96781fc00fcdd7c66bdc006c4903a19d32d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJM2558943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008c25ff27ab59b6fddf00e4e39f0c7d86f53e2435cfa838566ac5c5a01bdf5. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJL2559085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b1cc28c7859af08d5dd28f9928c3171244595ffab5a933e4a523e1ffded07. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJR2537311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf35afea7652258cbe1616be80a52536d586216e9180c0381e0ab3ab0abb0e9f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7M2581852.