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 0x4ced5d6ca487c2432b46d9a8905d68e801aa28d2bd9adbcb01911fe25dc50c8a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f27d9674-b5b9-4ba4-bab7-7e0015275c6e.json and https://artists.proofprofile.net/proofs/artist/f27d9674-b5b9-4ba4-bab7-7e0015275c6e.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 0xedb76948637ba832dc641a4b0ce19a40fefc933cf98eace2f4e503968775d5f6. 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/QZEZZ2100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f7328d948a105bebf881655764f805552617777bdb6ec2a595998ce6362d12. 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/QZTVM2381236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d10889a099f6d7a0ac16e9a9c7d72c68e35da7f664f8a20c9dd1ceee30afa1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZEZZ2200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9676d75638f1429421a0334c99ba93eedbb169e36d8588fcde99974f64fb3c. 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/QZ7R42352714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc5005806ad3cbb2a71d89cf836a8dfc55d004d82b5af957f301b02c394ddc6. 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/QT2JQ2500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb23c500521446ff0d7fe7727bbdedf6b188b9ba68a3f86aa52b2fb94d2f483. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QT2JQ2500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec64614846c3985308699ce246f7b09bbe8f757032a9dffe986de1a7a64524f2. 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/QT2JQ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d9d5277a7ab806248a4ec852289e51c80e4408e114c12924421689fc87fca. 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/QT2JQ2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b30f774e162749398ffe6a7dfbfb6fcf6021bf2bcaf28d688c3c171ecc324ab. 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/QZWDW2447059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0d8d004d9d846b8e53afbd7ac3c8c4d0c03029b6106ebacce1f28769115fe2. 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/QT2JQ2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caa6afba9def621ec8f5310e1e2450827bcca66cf7cf10fad666943fe679bbe. 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/QZNJZ2496837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa603500aeac794fb23c772c0fad801d73c1fca14c2407ce3e23b79ec9fe3fd1c. 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/QT2JQ2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373e60364f32e15b71ad6eb6a34dc29a33db2a5080c9953690182969285d65cf. 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/QT2JQ2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e6e9baca5fe5b9e98f3eac9fb2bf4e0d194e92e9debdb8f29000bebe3a1cdf. 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/TCAIJ2424063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502bc4b88c6137eca16e7545f146bdc8f301790e80b6a53c63005cf5ebf140e6. 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/QZYFZ2404604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21a6d35d3205adcf9b779c064d5822b731888b8a6b15748ee2838ee377f15f. 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/QZZ662417163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70050dd998845864d3536c9361fe405ce77671686703d1721ad4ea9a97e4ef19. 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/QZZ662365623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e44c0f1b55391b7d4c2afd007fc4f3da94684426ad2ec2f422ee0ab4ce6f5. 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/TCAHI2399370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed2e98ec745b198bd3d7e2d859e6d1c8be4bfdaab8d2d5cfa95ee26ecee15e. 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/QZNJZ2360903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b585eea70bfed7ba2e096d1ef86c182a2104c1efe29dde60b0acd0bec7df8dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJV2301363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174ac1a1fcf62280638d50d1da0822a51137f0cec212cef68012ca3419865bfb. 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/QZEZZ2100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3c60bbfb5565967343d5fd58c36c7352070306bdbb00abc6d3f604841f99d7. 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/QZHZ42150542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a0633bd775216188de89d964cd38db8ecf205f0404946c80e489b1ff27763c. 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/ES71G2043875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6c2b4f4ffc17c187ce25505b9e1a9121d86056bf7b5bff6f29e30eaf8a7145. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZEZZ2000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8d1303032915bf27623e467e15e5c2dfa6401e91a0cdf89be393aaabac123. 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/QM4TX2002670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7aaa89ae1da3cc9b406acc5ec3b0254c54f525ce9503b37c648c47c1b51108. 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/QZEZZ2200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e440d3949794daea3400cb4fed29e3194b8bd25a96c4fc1d3e705ebd81b0b. 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/US39N2304253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7aaa89ae1da3cc9b406acc5ec3b0254c54f525ce9503b37c648c47c1b51108. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZEZZ2200337.