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 0x32668939e0689ad112be2e239474b093803f44ccbafd424320a918a82cdb14dd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e72dcb8c-bbea-422d-b48d-f70abbe6ca9c.json and https://artists.proofprofile.net/proofs/artist/e72dcb8c-bbea-422d-b48d-f70abbe6ca9c.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 0x0ca3555d1827ad04a1bb2d517007fc1951d2881bcd53be013872cea527bf72a3. 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/CH6542128457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca3c425bafb8eedca1c671d39c0dd6e37d3095ce75d07a6da2b626ef45b6abf. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CH6542128459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf327f7005c2664c52af0c47e0e35212d927aec10113968fb94e034f9cc2b2ba0. 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/CH6542128455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e50042ef4ebb0103ad8a561111feef1cea91627acd475b01ae9ef00c8671c68. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH6542128460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3c18e74f7d32fc798b900d00fc3c14d8cec67e4df0815c1b842895d656e946. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:18:53Z), 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/CH6542128461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee902fc9d4b653e41229a915becb0edace90c280cc62b1534af2e1f63e589f3a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:05:22Z), 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/CH6542128501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc215d5c4347c0cb5d5b4af1a78b09203eaa88327b99d2bdf29d17e5f43cdd095. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/DEDE31057004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0110db28ffbb67b75427182e1d038e799f06bafe58a6bb8999ce78cf2a47b2b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEDE31057006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0a000c7068f2eae6ded0a20bc84c9ff3d79d12dbc865749c718ee5da8e474b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEDE31057007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbed2b198ca09fd9f0ce59b23eb12b5ba4997bda9d9a251d432529a183e657. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:11Z), 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/DEDE31184003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11385f8b663c06f224188b91d93e3f2439ac33a408b21215a5c47ee06299124. 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/DEDE31184005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61c219c85db7a12dd66236e943371b3bad6e12dbe66148e45f21d4a754c3c9. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CH6542387294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e314914856e43bc0467f51f63ff29f627e1124a1949769c3a7be38fb4362ae. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:02:47Z), 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/CH6542387296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610bad3a06f5cd74e035723ccc6d34f4f7c57ee5b2480a01fe677bfb4b7fe9f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CH6542387306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcad4b94a1c966d3e9b3169c3f16e0b675aac52eaaabef52998c15419efeb4b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:33Z), 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/CH6542387302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed85cd2177745fb504ebd6ee639ae5e0e51b0d7a2d210cfbf8378d364a7caec7. 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/CH6542387305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbf9153296bd8f1f27679ca7eb207751f31b0e79521b1ea2fa551a5de6e45ab. 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/DEPI81704213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce503890e0ae54d56808c7c59dcbabab2655af2f736c14bf5de668d047f6d1a2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPI81704214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3242809e09e3ffebcfaa1766d7ddd3f63c836e27b2699446fcd9bfa5ac4dc035. 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/DEPI81704215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a0328b354e8715141620dcd0075a5361aac63a62ad40c0d3c5fcd476a7e145. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEPI81704217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814802ea381b3e20173283ed5d235b03c8160a7ff29528bfdc04b52b2d189819. 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/DEPI81704220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2468aba5d8ca95de32609db66f2dfd2c5a9fa2b965520518718da4aea60c7. 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/DEPI81704221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe989cb0d6ff3ccf711ee0895ec07c072556b357d447bf2f4ab418b65430b7160. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEPI81704222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456ac8a9d3dfbb062dcf0b159a97a43f17240c4da8ca660247ba3a6a87fbf17. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEPU32201260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8996f52dcda3a0b032f08ba088ffd53829d29669a187825ade32105c265b53f9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEPU32201252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3aedc0db3935eddd2230f22d0c0bf574c5f7d88a9411f1467fffb6fa477abd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEPU32201253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2f289b49d3843ced16886d32e5a2feb57ea6ff012a1f70df31c040771e205. 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/DEPU32201254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30398c7549831257d319d5f78691ba03d61196b22f095d9ce76d30142bf39d23. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPU32201255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2bdf94f98b9453e406712bdd1bcf982bf1e0ded134e28ff6ac2f9daf62dd27. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEPU32201256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354f5c0813226efc857381b51987196ad2270d8bfbb55b65d4f376e63a2ad3c8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPU32201257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071e55a757bc85a9e43e85f3cd7f4f27a19eb457113616b68fa218931b6f34ff. 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/DEPU32201258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b23260a80beb5dbf4ce749e0fd4c10cbc3338ad57c89387b64b29f46ad9c9. 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/DEPU32201262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f1ef3f9c18e6cb39eb5a9793bf003c3bbf94013bb6764b1cd59788a6ab7533. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEPU32201263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0886de1efe98fd85d395037a000f62456bda9a1884b8c78210084524080d7dc. 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/USYB32027804.