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 0x50b5453c6bc58f970dc139a6be67a1518b44904e452fc27d91d6012737809d02. 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/31c6b175-08ce-4409-80e7-f483e968f3f6.json and https://artists.proofprofile.net/proofs/artist/31c6b175-08ce-4409-80e7-f483e968f3f6.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 0x6cba4065cafb354c3dcc9dbbb336ef50a97b1752f2d708e44bb34258697e7297. 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/QZDA42350837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462c71087615bb8f6eb7e8db81ced5f636ae5f489fbf8aa7407f4d6ddc0b2b53. 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/QZTAZ2287786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d83dbc2914d6866ac4cc62a3d152a2fa769b37cf0344004703c4fc71c49a0a5. 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/QZFYX2317098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faacc7936b1aa6d60931fb62bdcdf5da619510fa97dac963a3919e50d928ece. 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/QZTAZ2287785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec56bb0784c853b220deae26ede5062a0d0ec2c94b669244f5f36343303a8f5. 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/QZTB72245566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730cf3eb0421f4a6de4444f94182a3b92552efe25e6117347317fb4d32cfeaac. 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/QZJG52248845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6eddabb0cd1bf1e70338e7d42d998a3b71a4dc1c0eaaed88cb95650c7fd274. 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/QZK6H2024743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd58a5d8fe67889bfccf6b9fc2855b0111e8c754f22818d26da29ee24446b53. 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/QZNMV2089650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5684ebe8de907d86146cfb64b654af6f4e89f3bffe60617f84aa2f206be310e. 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/TCADR1804279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860668558d5885f806ac977d64da731c36013c7068ffad3350f922a53ec03185. 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/TCADR1804280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c3e0ec07db88f65015e103b6fd2abc14674d5af2d3c7ada2014ab2d0e872b6. 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/TCADR1804282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc399100714c28f467ae971ab18dde7aa7293e92f7eb566fa2b59569f1d0234d. 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/TCADJ1775917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea6c6668166fa0d06dd458181f709d65d3b1d5886ffc73dd52cd88395def48. 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/QZNWV2482761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462c71087615bb8f6eb7e8db81ced5f636ae5f489fbf8aa7407f4d6ddc0b2b53. 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/QZTAZ2287786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4d5eeae85a3b835b4115645e55266b6c3cce4a2e327ab5084b0e6e28390a00. 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/QZDA62472225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb798d647a56915b1951b94ec638117cc5bfb4c961f8fef729203e9e3bda52d3d. 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/QZNWR2200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ac2ed15e865b8193e349021ae9aa88512b5b3c4b244b7e609acb10918d420a. 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/QZK6J2216078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5352837ec92a0a21734ca06bc6c07fdb535fc55b05ead11d74f814fe39755e3. 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/QZDA72252280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa797744c961f568885b68cd709c3df4eece03f6283d2731a444a38131ec2080f. 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/QZNWQ2158016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a544ac589dc5dc4086c9e6076c5b2661d12d41c11219d8a068e1c704751a658. 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/QZK6K2175757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada55d9886ad496e00ac0f2efcefd6aaef03ce598d0236b3a7e404f5f6ef9a4. 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/QZES62110472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99681e30583cd78e5e9194c370f5f9ac121451d687684e8aef920ebada91413e. 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/QZMEM2017413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833fbefa442b189c2d914d1b07183a8fb282953c04ef8cda2876ddc567e56842. 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/QZNMV2075868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cebfcf49ab946c65ba841ca6e6a7a6d48d7f5079aa3319b12286295169286b1. 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/QZDA42039882.