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 0x70b6079024051c08fdd57af4eed14cb13f7b6ff545116fb301b3092101b40f18. 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/5a1e4858-e0ee-4f49-b369-c91b12c33a65.json and https://artists.proofprofile.net/proofs/artist/5a1e4858-e0ee-4f49-b369-c91b12c33a65.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 0x4ec3b041e90c845fee49979f199e29ef7049cf422b1bbec98956db777c8c10a2. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:32:08Z), 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/USYFZ0903602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad1ddc547e4bd3c7736d9c1a227cbc5c016088d93333ea21c5856b48f60afd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:08:13Z), 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/USYFZ0903603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9714fd8fae4da0ae8014c7d84eac6fce3cbd0c85e7240891b693884e7ac82e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USYFZ0903605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb25340b11697bbfb880310595555f7947a1fdd2cf68029f86f35d75727ab105. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USYFZ0903606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce1be2ea688c73c573607bb6151bee6c22881cd4f8329ad64ca12949c18020c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:59:11Z), 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/USYFZ0903607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12194a0f695053989210d68efc255d82267739e60a314378a9334cd3fc17a418. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USYFZ0903608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615cf841ceb68eb24997f586b414e50ca1731f31312b089f71b82b2ba8d4ef64. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USYFZ0903609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430ee00476879fc9ce4102d3ad3b7fbf92efe94509bb572d5fc14625b53a79ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USYFZ0903610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7bae55a6384bdae925f4ee2e2bf2173ae542fc5af6eecdcb211f4d82fbfe4d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USYFZ0903611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4038e8defb00be2d5d7b9a24f96ce4bd19f36420a79b902a83beb869a9463e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:31:37Z), 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/USYFZ1120002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a8b55eb14ac9ad253f8d13943560f8596011fc5185cc06eb9416a9d6fb83f8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USYFZ1120004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dab79f0ec4cf29e0cdd898d363333bcaf585ebaf29d0def32a043c395f05b4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:44Z), 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/USYFZ1120005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a26f9a0a56a0bd79201e98cebfc4d71d52ea28afdedae5246b7cca6848b7db5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:41Z), 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/USYFZ1120007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f21db46878edd2a834e422f6e9c980b5908aa7d395b5eec8442af89d68e00b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:02:40Z), 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/USYFZ1120009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc329f4b56276fea19b637d71f962bb8617d0bfb55f99a97da846b7228ed881a2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USYFZ1120010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce3ba8ee5d30f584947688639cf644aa11a4ad5a6e0491df46c9b975004f282. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:44Z), 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/USYFZ1449601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e01807914ee64de6ff9911380b955a4c6109fc37f3bf914891874bdec3e3682. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:23Z), 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/USYFZ1449603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7636c32a623cd3a2a3d92ebbddc9a3bae31989a852f7e860b1837177baf9bbc. 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/USYFZ1449605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5f2c8f9c37aa0f2651640049864c857a1dd9f4991477a78187384046e01dc4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USYFZ1449606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752a5ed710f8c82d0dd77d99370844387b579aa6667224e3b39c097361334dd6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USYFZ1449607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97594873d9840b9270b7ccd04eb127201ebbf50f97450546de2b3a8cc116bc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USYFZ1449608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1240da31883835e92a8ce01955921414d3e6c0973066dfb5891c9bb8ebc4ee07. 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/USYFZ1449610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921e7f28af0079a69e453e953b6d14fd6fbd49b115f75da2ac3d30f6d417821f. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:02:23Z), 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/QZMEM2148778.