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 0xcd80640feb6de2f49d9291dd20ef06f18b74b44b484e173c1d8c14c5fdc44f09. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae7c0fd3-f2e8-43c8-8bb2-8ead9ba49e3f.json and https://artists.proofprofile.net/proofs/artist/ae7c0fd3-f2e8-43c8-8bb2-8ead9ba49e3f.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 0x16c13b92229b4a00ec202440df88dbfaf6260b5d97be861b05e9c1ce8e692b10. 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/QZNWQ2337169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a2501bc7bbffd2d831be6f6e7c0ffeed55124ec4b6cd864408d6e138b4a624. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWQ2398942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00356fe38bbcd251541d70d3784f8201a427f1db49f465200b618bf64dcc062. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWQ2337172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4fa11374484ca22abab67147808e62bd3afa219e5d39e7022179784b6f67f. 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/QZNWQ2337173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb339d4840339108c42c1dcd07522eb32624ca9e9da2c34c984b0b65db10b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWQ2337174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1301820805e00b69fa50ad1b6214dcc78e0912e8c3cd49d7717e0203b44ff9bd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNWQ2337167.
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 0x833a0544e4ea740a0730378054aef0d946dcf01d672535bc140fdbdb9820d856. 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/QZNWQ2337166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8136169a741ea66bc3ec1aaca1993adf419b4db6f192db336279a0df448a25b9. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZNWQ2337168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d45ac578dbd8acfccfdf1eaa9296020ee31884c895b5045c4f0542ad9128d4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWQ2337170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0879696507eb7ddd2276731bc2fc3b09f62d3ac3844890bbea6c96bc04a9a586. 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/QZES72269096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10902ad8ee24efcbd8a215806accc7a8aa2d489696cb65375e08c00081e196b7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES72269100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94be0eb4d8ba75786fe5473ad686014c906f1dca1845c756151b05aa6a51a46. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES72269094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4b63802edfd3ff24e43ddebd32e402634ccc678d248d918e0f8229ee82f526. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZDA62209552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd254e7695ccdb928c4a483937ef7d82fa575d441ea2cfd7f4e2a38708b3d70. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZES72269095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58640da0e2f7cf8bca880cb3fc07c9415b5d6970aac78334cf821a0a072afdea. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZES72269098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826901a2aa3681ef2d369185ff4660619e235483df1317c6203eb65c8ea4344e. 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/QZES72269099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d313993511c8a10e2399afbdde50419252ec4eed0b087c12d833b3c9256dc5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZES72269101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba04916e70e39887021fd471d6fb56084dd7429fb7ad8a88b615b5276ae11db. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES72359580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81bfce34bf39da8d4cad93b2131fe6be261751dde299e3212bd33ec75a47ac7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72353481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d7ec828d811927f2d212aca61f306a124ae2bf97087335d3d0a11c6cddca8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ42331527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0849b12201e99a87db196def60032d076061aaa47a3a6261361afc72a9253008. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN42396167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0e18432e64903ee9de9858bb796cfcbfdff88e3015027bd7e36489b124b08d. 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/QZMEM2304587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7869960bcc28ba951e89811d574967939adff257c8cd6ae82c461b69ade7d411. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEM2304588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab115e55ac71e37041aa9ec636b0396041b59662f0ed9822a7b04218a8cd22a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEM2304589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa192fe50549aa5e092e44ca278e53d8411f2fee26c68b13164dd6e07c90ff44. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2304590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08581671f5094529ad15b888a0ac9e3ffe4c8a2bf585108d582017ed6dc8511. 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/QZMEM2304591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d05d4d7aab3d08b353b1b1d384dc8ec270dd1db6b5403c16472d4f72497b3. 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/QZMEM2304592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b150c7c06123ae62348c5b8ea10371f83ecac79debdf79415c695280444541d. 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/QZMEM2304593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ab43947b64922db6fcd226aded1d0ae522f721a8a75991d3f55302d07a09e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTB92370053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f7f2f10345c89ae13f121c957109dd253cb08148e83c264267c70f1b777a9e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFF2320182.