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 0xcd719b8ffadbdb291166bfe69cd368139676cf3e03d2e08cd8ec90d50739ce7c. 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/e449643f-bead-4cb2-8263-d369c42adf51.json and https://artists.proofprofile.net/proofs/artist/e449643f-bead-4cb2-8263-d369c42adf51.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 0xfd3a92a87580f556342ba16ee3e1a8601251fa032eddef6878f20aec9ad6c7ca. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEBY41200808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5d4a3d1f477688243cbaa20501aa6744d7d24b0fe871ee1c4fc9b312ff21fd. 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/DEBY41200803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a541c6f5f5a4712b2c06b1fa958c70bcefad85b5a73fcc72a4a735c059257. 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/DEBY41200783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45e173c3bc5dedb0d701fb510141f2d8ff8d5ba48f21ed091dfb044780fb91a. 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/DEBY41200814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736549fdfb1b2dbf3cf917ba3df4c5640666819f572481dc787fe3ee1a46366c. 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/DEBY41200797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb107a9ea42db643c0c82c43d5219f94ae9f11281e90ff26fe98fdd1e71636d. 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/DEBY41200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f9c8ed2d8b2ca6b4bda3c0dc1f79584e184a052d5c359c7b7ef84564cd790. 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/DEBY41200760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736549fdfb1b2dbf3cf917ba3df4c5640666819f572481dc787fe3ee1a46366c. 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/DEBY41200797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd8edb690a103e2a9f85f77e9bd65e6e8444d122a2e54457093cb6dbe341723. 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/DEBY41200798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e8b55bfdd1bccbd49fdd794157fd28657d51342a148d63be40dc89c9971a05. 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/DEBY41200794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd826b97edd7337befbcc27e0bf6fb3649c46e6aa1b81cdf650f567904ce4d6ff. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEBY41200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14414107b305d54f6e35993e5ba3be9fb069a63f3a731633bc26491a9bc20bc8. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEBY41200796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd826b97edd7337befbcc27e0bf6fb3649c46e6aa1b81cdf650f567904ce4d6ff. 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/DEBY41200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736549fdfb1b2dbf3cf917ba3df4c5640666819f572481dc787fe3ee1a46366c. 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/DEBY41200797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33813864d53770525b4bea9adcac93ed8b7be1fe92f8bf8fb4788bd34215c3f. 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/DEBY41200890.