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 0x88af094021c13e7af478ab14e6ceaaf6f7bf85d80cf9c5effe1ffde68c164e63. 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/f6a8610d-029f-4bed-83b8-ce73629e822c.json and https://artists.proofprofile.net/proofs/artist/f6a8610d-029f-4bed-83b8-ce73629e822c.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 0x0764d0ba1983ed34f257093947e611e88208a074e6a5ca58b398479e2d43a21d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6F2339696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110248e97c876b033be744f2f439a8b4f35468be75e06f02ee60a99cb892982b. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZNWQ2348148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33d32a726e32a136fe76d4ede0c7d7b984a38206f5221a91f33155e6315b45. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:28Z), 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/QZTAX2356939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efe3219c1fd4511fcd57ff71a8d3c2dcb4ee0e4a1da869e3f7d9bd0b9f0d5c4. 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/QZPJ32383814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ae5d0682b6ae559c8874fcb78f4a91fa5e362bcea9e1b12ea56a64cdfb3860. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:46Z), 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/TCAHN2309690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee78f00cbc385d918db81eb2efdb48cc60f920fdb3d24eef7b7890a5a27d9dbb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHN2304436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833efad5dea46329e7bbf0ffd9d1e676fe63cd0e24907f375378d22e01d675d9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHN2321233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567a022902696652f906b666d147331507e0e7faa8f2a1039b51708e348ccbf8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:32Z), 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/TCAHN2392676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e70884ef97e32065ba46d4011d57a6cdb34d18589ea2d745990498b433f012. 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/TCAHQ2371013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dfdb8480daa3999ea848bee8a2f1fdb86007b29aea3633c1dc3cf78e58a112. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:50:06Z), 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/QZW9M2366432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d553a10618cc62b50b649dc7d14ca9b19fc52810d6538f02ae2ebcc4471774. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHT2329978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93adfdfc991b7da19706758d4f6da6b4fc36486baf198e41a662e756344be58. Chain 2 (Bitcoin): anchored in block 957551 (2026-07-11T10:03:47Z), 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/TCAIT2455098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a56299a7a52bc31d4a7099fac5a7acd9fc2f6921d93bb450f2660e4a7bbd874. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZPJ32405403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba54819755a094bc551ca96f9cbc9c3356c76ea1ab46976a083c76187287f4f6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZ5AB2485364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ad31006c34ff971b1adb0d5c622782fdb32944481e3abb30cefa0c96240e7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGLS2403125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70730fe8c72e882e81ab6836e2e05b27f5e76af83a54b51211c3292cc398ab8f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZPJ32361129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8522f1b7bd116a3762d909fbd31d5e9975b1e3966c050df60e158c735044f1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:46Z), 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/QZPJ32372081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631ea868f9efa00344f75b8739353a53545666097abbd7a745e3cbf91b66c4f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:47Z), 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/TCAIT2447964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4397f8953640574e3455a3e40bc32d0f8fd5ac366ce525b43f636818bacda8c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:10Z), 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/QZPJ32418947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694ee20885f2aa2c8f9cc2c899a76b45de428b8e447a4c5c0ab26e03445cfac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPJ32433535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3372790071cb6b4142748bdfc4ffa9018b62878a05c5f12394818a69b18bed. 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/QZPJ32434055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec252f6cbd2d8ca68c2f90db2b0eeadd1d07bb634ee0a991d2b7b4c54bcfda3. 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/QZPJ32438726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e85977a16537192b6ecb3bb65bebfa18322211c06a1550692be75df3036077a. 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/QZNJV2509797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f7fe2cd65f6e72812c18b445d316ab160fa84307f33c83b3fa0ab6e6ad196. 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/QZWDE2583749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0dc1c4ea3a8230c330efbfd5b5bf23a9ee2101493a964120e3c4c85647028. 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/QZPJ32507135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02aefd4f55b192d43bc1518837313b15af1aaba76852db413879d0b36a9ba20. 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/QZZ8A2531901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbedb17128611e2c8245a5f2ec05b520c3e487173f115e9129c8b31d53c1aa6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ8B2557483.