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 0x28796281bafd48a7a1c91912c5c5eb80ca0292dc33ed5f5379d5f73d62fcaa80. 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/9cc6b3a4-1f9d-4f17-a62f-ce38d340514a.json and https://artists.proofprofile.net/proofs/artist/9cc6b3a4-1f9d-4f17-a62f-ce38d340514a.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 0x051084450912a3bd33e17b3b2bee22e01fb44f3118120e151788c3ce3d139dcf. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:37:41Z), 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/QZTAU2123699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be9789dc2bd860f4a5ab5b2cd7ce38d6e7e852d9d6f912f649a048b309fae60. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES92285155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc89c8f8635ae4861efcb92dd4dff6a87c2bfafe46a68ac6071ccd9bb7567bf. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZTB22256694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6962db646360a4d6f81a3e86aa81f8edbd4ef53e2a5d6c073971edf7dfcde4b5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:05Z), 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/QZDA82300975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe728786335ebbe051b0f0075c1813949f3862dc4f66edd0ccf944f89f6eb2f4b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:48:55Z), 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/QZHN52246001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a11433fa6cca3e8496849152e0c216889372c7f9c144e148d4965c38dd912. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEN2399551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d83e02bac312f6d807b48efa8f06fdd2d4c3b1f9292d21e7bea345e53f5943. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEN2399552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443166e0a44582a29b3b4eaf055000d816ae34324847ad1172bdaba70c054c40. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEN2399553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb998623212a4d4764eedefe5dc336ee1df79c6c934801f6aeeedf53574083b7. 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/QZTB42350789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722fed654454541c6723e8aa214932d22f9ec98d010418bb4e5a68424b41eaba. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTBB2385109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf1a5c3c6461894dea43357eadce8306337b84a32ec5cd916a944bd6e68324f. 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/QZTBB2365811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012aedcd9a6b2d41e0528676d8fd2602276c70deefc507ff577e671e122c3395. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZFZ22478264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e7aaa94bfb661c63c5ffac5a9efef3100f02b9b6bbaf7ab1e5bcec0f048bff. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA72463641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f216fb6cc6d1f79ad4b0ef9ca9432c653b23d6a387e0fcddd888baf9f7432b5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:26Z), 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/QZHN52428806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b239ba5638387e61695ebf31f68ccb0bb32218ea7d6e9d9580cdce0db409a3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN52428807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb183a9eecb67451fe34ee557722220364c7e0b47bf50af864fef3fedebd54f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:31:20Z), 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/QZHNB2462458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11848bd75d6e8a6d0abcd7240d3d52bcf1889228c51b11836ed6276351eb745e. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZK6F2464729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a087459915898f1253dbd31c085e4e0bba6198c63b23f3a0a4dbb349f391d0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWV2473007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8975e3f9aec12bdf0681d0c50514e7c23c1b407aa661dcaaa9872c9cec6e0c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:40Z), 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/QZNWV2431487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f63360c3e2ccb52e5e3f450d0e722b3044cef978a5630546e75ae06b1348a0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZRP52481491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d2773238640d35b659d8fa5f05dcfd0a326bfd7809dc005d645759611519f1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZRP52481492.