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 0x089e548a6e6387cd5b7c67fb30bd9e9eb9c91006f3dc99c58f034f076b82d29e. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/546b2b21-85f9-415a-93f7-495b076a1a6a.json and https://artists.proofprofile.net/proofs/artist/546b2b21-85f9-415a-93f7-495b076a1a6a.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 0x0939c9d936d2c540ca4bca0ec4119d4e31fe1d7a10bca4d2869f93b3dd884e51. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR80T1101158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220e43330b96601d77b38cec183b3a0e21b1debb11debb78f7a031a91aeedd2. 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/USRDG0710281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e2532d88ac89ec8bc20b86f3a9b7afe9ebb02e405da6817f58701728174f98. 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/FR80T1101157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a6d9bc98adf222b8fcf1190f7782a14477f08c376d4751a0139b77df877b9a. 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/USRDG0710280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51d26ba148975e3a7f6acf577a22e5f5aa6a952344681565bcaa5680c12a6e5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USRDG0710282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c0db82ae1021453a434d3015605d62bb993d34c906aac6f7610425f84967a5. 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/FR0W62034554.
7 merveilles de la musique: Dalila Cernatescu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a6d9bc98adf222b8fcf1190f7782a14477f08c376d4751a0139b77df877b9a. 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/USRDG0710280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee5564af218344a858e4a856cdc84e840aa6a04a8ba2dd1c02684a8da40f03. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR0W61595230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53838c95e58270d3612da0b39c4c1346ca667f11c73a54125fed2083c418ab1. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FR0W61595246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e2ca9be1e2e6af6cbe529b45c4160d5983e078db5fc34a25ac2ca15a911c24. 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/FR0W61595265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220e43330b96601d77b38cec183b3a0e21b1debb11debb78f7a031a91aeedd2. 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/USRDG0710281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee81c2d94e032984c90e1c8f66629049c5080afa75f2f233b1aba6edc316cab. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR0W61595340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a819da9248f5dfd3eca3d553dfdbe99e0875cabfc596c74af7cc6ac351b0b7c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USRDG0710283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235e0cb348cd5be58b9b4edf783293c9c51b9d87490034fe7a41e2d7994841da. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FR0W61595355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69b09e092bc1003891727ef9944fd1a33915566fcad7a9c81988bc190b59ded. 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/FR0W61595363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51d26ba148975e3a7f6acf577a22e5f5aa6a952344681565bcaa5680c12a6e5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USRDG0710282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec6c9f99c4f927b8d59d1ca90d7fa0ce1e31cfabd8b05acef2c0da324b4ab74. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR0W61595368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a88829dd6727f7631e39fd1de9f6f4b6dad240c4f23ffab78c6d3096ad46b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR0W61595380.
Herzlich Willkommen - Ihre schönsten Lieder zum 30-jährigen Bühnenjubiläum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad447bbefcba1de73592af24741ceb16b7e708fe2339884b1e1395ad3aa8ad1b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEC710400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf709078041a2b41397e93172a7b970a36e2121845c1632933b25a4e7b697d567. 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/DEC719500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f60b3e5f27a05f2c1745a1c23006624bd69ebb57921d52e6dd5e92715305165. 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/DEC710500520.
Doch des Herzklopfen... des verdank i dir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6062aa69611e6840da4b50689b10eb7acf8e8a15ada43fd802d732a63522171. 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/DEC719200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b8c4bc077144c665f56186d19f013c2ed6235ff24263580d4d0b5291258f42. 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/DEC719401055.
Weißt du eigentlich wie lieb ich dich hab'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a11126d130e8881a6817082ebb1a5c1122879956ffedf5cb1d7e3da85701164. 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/DEC719800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8d5b4b6117854b056f8078bf11bd683951ddae4eeac45bdf0235f8d4127ff3. 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/DEC709700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a5b92b598f865f0342909959caa344f8cbdbdb802e79da4df7eedffcf8a39. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEC719100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88122f63951f02e3a3a2273d44848abe8fb92021db9c40f852a3ef0253698ed. 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/DEC709600246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b37280d803157fc8c557520ddbbc238645b925ae3f1b9d160badfbc080c98. 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/DEC709800091.