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 0x5109ba5df0974eaeb556b4963779aafe0239ba8953a843772f8493d438e9a5e9. 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/63575197-def0-446a-8845-ee3d41ba5c51.json and https://artists.proofprofile.net/proofs/artist/63575197-def0-446a-8845-ee3d41ba5c51.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 0xbdf3903b106f551a4f824cdc688696b20771f7d9ce1f2d4f944d6fcb3ac85c11. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:57Z), 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/CAZ700902177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c51abfb73fe2b41610eeee62a5bbb1c760019a760bbc5e94606184ad0c55e7e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:58Z), 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/CAZ700902178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd6e673754d83eb9b635760029235d4ae2b07fb5d543c0789889b4164f290d7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAZ700902181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73d2f6f5f314af039b6821f5cad0e27f04856595cfe392acd26992a03db1ab2. 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/CAZ700902187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52690543b0acfeddac5906fff27b61923f126f7860682109333425dd1a2c5b3f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAZ700908289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7381792fa2024ff32e05b4c85b8f505732c7062b12ac6b2b1a5b7e27a2e2298. 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/CAZ700908293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e314df5482222c9d5caa52f6b254e8d828ba636de67b46e301ff05a52c15c51. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/CAZ700908296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1536aa134719bd336cf48907b3b9f3a121e770846ac0f497ecba92268d7856c3. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:41:17Z), 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/CAZ700400979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aa075a3b347b795cae4f430ee214618b3621ac3b1d5ed701947a5ee2af0d45. 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/CAZ700907819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb7533d5c918476dd54fc4dbb177442c01f632590f7c70573ca3e887373b199. 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/CAZ700907821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2833c45250132ead4929b1490655bdc000bdb4d8fc81b6088db54a7e69387. 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/CAZ700907820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891fbd10fff2fcb4f03a2623db0c6ec6bf87fcc07c9e955bb0f9b4959d48549b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CAZ700907827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b83e05349e075e8a961c2fb7e7c9d955171d3711d16bdec86de4a3e65ed021. 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/CAZ700907828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b63433601bc84bede074befcad99ea3e7474710174b12b29c71919d9c35847d. 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/CAZ700907909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abee0f1828b86c8d3340418b48422e043b1a5d119f17cb8f5cd58c4a26791c3. 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/CAZ700907830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d62bd2e12aa10bf6da9d7f58a7bbefa4721c69f35860686e9e48f757c1a3722. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/CAZ700907831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66498e801a71a54fb69f1c21a3c201fc3840e2b03cc71053d79e3aa82d9c4bc1. 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/CAZ700907834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f8b4b716e6c45c38c17f9c9e52cad1613b2d2543eca403336b229e92ed416f. 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/CAZ700907835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303e60800011fb7b845d866c77123bd609d5ac5b24ac09e02db891f12c8d837b. 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/CAZ700907837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab1cab66c9a77b24a5182ab964b5349c7ea839a4cfde3372d546feae73eb17. 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/CAZ700907840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545ea8846d32381fd3038d2b2556aa64ee87815d7d595f1df1ea2f7cdb7e9946. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAA0Q2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3a960c7e14c81b15040c3efa3e4c687575cbae4ff4616918ab639c06ea417b. 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/CAQSY2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04050708d3bf266bceaa0ec9eda0d5f451ab913ceca72817834cfa23b2f59be5. 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/CAQSY2100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e8b1738e9aeac2ff98551a9c39d1021646c501f6dda55825043df26c21f9b8. 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/CAQSY2100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10444f8ce2b8b8e549248474d98219835d01e35033074f9ab73336def066793. 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/CAQSY2100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fde57b5c9c2b23dbffcdee7e078249ce7382a36d418f61ab9a120e661f8da7. 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/CAQSY2100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bb760a19127dd1625a38193d658ce5ecd5fad12a13f0d10411c2dc9a679ed3. 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/CAQSY2100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1b1aa751e52cf8061a11cd7fa7095e34072a61bb1f86a28d8b9313e781d3f0. 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/CAQSY2100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d206390b160ffe78050b3c9579fb782b81c794ac95c420a29d79e03e4cdb49. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:43:45Z), 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/CAQSY2100168.
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 0x3b51545698341c8cf4b11a8e60ebbfb9d93100bd1a2f7a4296c53522df8d4501. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CAQSY2100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89d038965744c1aacc37f3e455861482467efea4ee575c7cb314b4c48cdbeed. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/CAQSY2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e87bde04d1604f5970028315277e3847a8311f89f569c99dfcf28cc2e7f89. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CAQSY2100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49034c691714e3579e116bea7fbcb4814dc432204d1359173764e6c8b6cc9e18. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAQSY2100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513292485bc4ff489d2d0ffa5f53dbb968ce7bf79dc01ebbf260ac040775bdbe. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CAQSY2100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dcd5a00c0ef350a0898be3e3a2d4d7960fc95261b1d6df7f7de383e8c1bd07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAQSY2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6fd618fdd3c22b5908d8aabe4ef9ab69fdff1c36af244597c77d0b971debc2. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/CAA0Q1940012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aefba7624b472fa9188289b3f2bdb6b1266c8717e819b0782f3a38c7764eef3. 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/CAA0Q1442112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0144a5d477484de8ed4a94a11c64dad2cf8b8a7a431c963723b4b14516596245. 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/CAA0Q1021889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4e46392c48d8b43cacf51405951206adf358b17531cb51b972f569296f71ab. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CAA0Q1412310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0816a35d4b8b189d4e7f355ad0ce5b505d2118cb407d0514c68171d7c1ead79. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/CAA0Q1720011.