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 0x7415d01e6aa36558cb08c681935e003555b646eb338efce6f2255d74ed7ae40a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69d67811-0be7-4d8b-98c5-cf8d69cf672e.json and https://artists.proofprofile.net/proofs/artist/69d67811-0be7-4d8b-98c5-cf8d69cf672e.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 0xb86affd7026ec6af33191037b2cab34a70bddc51c2753c7146727bfd4f733577. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TR0171601317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66b9b0f401f43afb99df08641e3eff71e6c51061b7e83cc1e36d48b77a37150. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0171601319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b374acc3111531a6205b53142981b07054381a47ecf8a000d3c374dd5786228. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR0171601322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b985f867eeafb1e6be616092ab9908175995a9b6388ed8546c6bba2a953c47d. 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/CH6541619935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf63a0054628d05fd375bd4ba48cb6cd4fdc8d0a22fce7dd80d7814d712d0c9. 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/TR0171801511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0238118aade2cb3fccc6f6702fe10978e2aaeed56c63ff49e746362f1047d9b6. 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/TR0171801508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ad8451fdb5a5f040cba382ad6d076ffc7f59765f6ceb6f94cbf98023e4255e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:48Z), 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/QZFZ22076224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ebfeb7721a736527c776ffe4ca2c26b10a8401e3b3660124e153f285d0c578. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42041283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2b267d2df360bc707188eba5aaac138fe5220d36c739a1962e832e9541cbe9. 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/QZHNC2017923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656893502287c5087ee17e90f22b6f57cf5fd567e15e1e22c27e50dc748e19d4. 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/QZK6H2046602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ca7202e55f505db50b76bb3aa26f4f7eef953714dfd1e210d3d68b3355ac1d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZES52187411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9916ededbf5a86f49e4c7dc242afd9c77b1f93975c63179b49a7911b447786. 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/QZMEM2264769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20863a803faafc59128be61194eaa4c0f708bd52ace93418d14528f5baed7aee. Chain 2 (Bitcoin): anchored in block 957566 (2026-07-11T12:26:02Z), 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/QZNWV2225294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9113b95f25285486f35d5f6ad15c46501ff6684de7e96d03560b783671c2e691. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB82241453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5676acd506d53a03a551ec195251841672f61532041bc81bfb9021346da1b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:30:46Z), 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/QZK6G2357871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aa9779837b79d466434c3f72bd3ddee9e1ecab04c9e1a5036d31c33c489d99. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB82306992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42f1a7ea1f29955fe172b619cc88e5835cd8d59cc6f38ae377497a8adbeab75. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFL2360330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1739939afd7e515a2358dc4a271c0422f09096eab0a8815d4f547a6a1d3ded5c. 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/QT3EY2423520.