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 0xce0a017ad926a3a8abb7b5790b70eafdec61aa5788607765cf368e71c81d6a62. 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/cd5c217b-ad34-47d0-b8a1-5afb2eec98c5.json and https://artists.proofprofile.net/proofs/artist/cd5c217b-ad34-47d0-b8a1-5afb2eec98c5.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 0xa7e6ffc1e9e50fe4d95b4e8f173f0e7b71f6d25d4be0c5102ad555435b7c3a75. 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/GXBDS2331016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2622a1ad01e6819e198927cb003220b3d5b7fc20ae544155100778b937dc5516. 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/GXBDS2561060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adbdcfb8e8b6ed861b5d358c6ca6b4e6b3142a30926f753b369afc1b971eb65. 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/GX8KD2563988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892da47721778aa65595b4bf08fcab88508e5e6470fa8c49a9879e6d46d4b2ce. 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/GX8KD2532147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd13d30c8859716964130d9ce002f72487a4ee16509e89ecd5b9646a3520b520. 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/GX8KD2550905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb39db271c2d72d6d5e0f6f6c1bac83a8d39713536baa6d5a47a81cd5c56f57f. 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/GX8KD2531789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d0097fd60025ca7673288ab01e7ec828470c7209becfa347701d2b722a1caa. 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/GX8KD2573750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472b9610eb3841e32b39fd73a9d3a3bc4ef540aeb746b9394fc7d8da9ed0c21b. 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/GXBDT2499674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801fb76f21ec7ef3c2f85147330ee93b40b7a43987512dd36c3feca9f3fb548f. 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/GXBDT2493492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de0e9076167c59110eb2494439bdf2135ffc6c09d3b7802fb411ab3e492604. 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/GX5MY2409782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d33f4bef49fa9206cf004dde8939187a35ded30b654bf53724c1d3aadd95b. 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/GX5MY2498694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced072bf50ec4a0bf157810f96467b7c67c6920a0cf888a5ea37b984f07f45b. 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/GX5MY2461539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bce8e4e391b3c3e210cbd06982b4f3a1631073ba18ed582f68b5048cab3b69. 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/GX5MY2462824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ce3579421b407bc3976178d9758b6d559947305c59c4b8e282d306160f5448. 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/GX5MY2439532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd8d52519fb176bc5b827731170dc83e31fa92a5e16e8954d38d1cea521bac4. 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/GX5MY2418381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9b34217d6861f532de7069065c65fb7e79993859c73af896135eb8fd4b9598. 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/GX5MY2464225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55aedf63f90eb3e163bb58385d206b67b51bf26e695879654c5a60864f374fa. 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/GX5MY2470534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d0d0bb548be5534f5fa4c2ce41b05ffd69586b9cb2b4b10555ded75c7362e1. 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/GX5MY2498313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2177a5244a544f1cd4e7cc1ebf90229b33e0687b78bd9fc1ea0a38dfff3bab. 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/GXBDS2420469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e174ebd8b4f42f2821d451d6cfb3de32f2e380f4ad2fdcda1d1c8a8a9e44710. 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/GXBDS2448703.