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 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 0xd0a26107555caf16dd6c210aa60218d55946a7d1cce61dd9abf4baf30e9ec209. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a56cf0b2-9269-4432-8efa-ed79a435bb44.json and https://artists.proofprofile.net/proofs/artist/a56cf0b2-9269-4432-8efa-ed79a435bb44.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 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 0xd03de5bd8ea9ebffa279d492eef9e047b6f721580fcaac9535b0c0fa1e6e51d5. 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/USA561156497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3a2b06ac0fd8c8ee81cdc42b013ba12aead4b58d50d019268805651dc8dd1. 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/USA561156498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0131151057561a801e6cb3271ffc6d3f2a087b37c6637e7a7f8d6d934546597. 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/USA561156499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ac39d36d8578a143ffdaf1d1a07a40d585862ba844b411607e5890c8e6a5e7. 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/USA561156500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0d26764d9cf60c3c8e4a0ac7c70ef7caaf3047a57a3fbfe9bad59fa9707fb1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USA561156503.
The Technical Divide (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc178feae6654bb5220955a44a2d316dd921ccb49ab2ffb720b36f1dc36175fcd. 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/USA561156506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030569962de3bd847fc51cb82f8429a1104f8fe7d91aa07ccf2bb0e651f53e1. 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/QM6XS2302857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72c0193370ff6911b66ca77e2e604f0825a1fa9b5dd59afd16e02658b50c044. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM6XS2302858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d11a52ffb849d61d0d8409bafba2e018f303a7752e949118252c2645e50dd. 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/QM6XS2302859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29be01ab50870d90ac9d4f468291c2bca70aef87d0611004eeff533a4bfed7ec. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6XS2302860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e2332c9a05326cefc7dd97bd12781b4001a7cb140b81a461ef79d3ffc9a7b. 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/QM6XS2302861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef632a997496d3bd3325510fab0c09321facadf6500ebc2f625df180760d2b42. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6XS2302862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b16b32e6a14defdfed7c86ef3b36ce5c247e976646c1f480b6d624e0a2edff. 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/QM6XS2302863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88e240959763e88ce07fb225e169e42bf4e844885064b877dbb4bd3686fdd45. 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/QM6XS2302864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd474336973d9abc7e6c8bf7d144736a2470843cd05e10b9de415f505bc0893. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM6XS2302865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ff7dd9afb88fa0d371b42b34ab85dae0bed2394a3cef1ec77dc4240aa1d44. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6XS2302866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa481afd549d45431b520ec576339c2d6e673174b204be7d8775821dc7a0b16e8. 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/QM6XS2302867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cca6cc720ec8ad65b3981366214b1e60624a6d984018816ccdcd6dde7a433b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM6XS2302868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786652d2244556dcc95f4c32573262096220f15f69c8929649576868667acfff. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6XS2302869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b00bfe8b2064e900c519d320742bfd3f70840408b002904e6bc48404073d40. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6XS2101983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d632df1694ffdb9f1a514c6a3f42d617eddab545401332aa8b3271a8306de93. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/QM6XS2101984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacff745604d310d18f713d90d3783abd5c9887bc2a4941d9c510800c2daf8508. 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/QM6XS2101985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d95dd9a9e145d72ad43ecebb127404910435b2f9775cd87e7ce7f692382f5. 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/QM6XS2101986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ec33835a6008e7c3972eaf467a1e91990462fc492d463b19fb8e2b2b081a20. 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/QM6XS2101987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbf909c6eef590fb35cd652255e6708c66203fe695d834f55c315335a34d83e. 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/QM6XS2101988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1184ec5791be910deb0c695bc14b47f7fa6e8487ff5f78c09bd796fa1b2c4a3e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM6XS2101989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4afe080698eaf677145c3832020499276b61ad31cd539471236f8b31f5a03ad. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM6XS2101990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3983423751f77c40f05f0d5225be080f804df53551abc47bcadf34408e725bda. 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/QM6XS2101991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b4d721b864af99e05aa7e25d64a0b9f8d9809c02c14f7bce213429301fb13. 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/QM6XS2101992.