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 0x7757f51c6d53c88c935eee68c7e2277373e9a9fc9d70a1275737992fae85d8f2. 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/f038b029-faaf-405e-9fcf-85762d4aef30.json and https://artists.proofprofile.net/proofs/artist/f038b029-faaf-405e-9fcf-85762d4aef30.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 0xe429f350409ed9815147876c1cfffcb38ac48c31bdda016822a04d50916d3968. 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/PLA500000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40beb8beb35f771e9cec373566e8db41a696ffe43bedd6c056702c9863d2a4e. 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/PLA500000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fbd63f72b1d5916e1ed03ad27ca7d6e6ba10e680dea7811363edafec26f31. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLA500000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c214133465264f6fd953f319c324c16d335f6cef75f20fed73cd6fd19857fa1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLA500000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1523c328d986bf90269a8e26515f28dde3bfdfc76b8f2d1e60b48fa58b711014. 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/PLA500000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7530c903ff5c6308af9409365686238dd48fd6bd487c8e270e5524e15b57d0a3. 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/PLA500000412.
Niech moje serce kołysze ciebie do snu - 1975
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27137cd792595b61009671c8dac42305c2be8801f87b82b8e717006a74708018. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLA500000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b583c75e0a297300ef201381b1d68b395666ecd36e46b96777d5a56771be1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/PLA500700921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d589b339476aef37163aea1cc757a01efc30d838617310e53ece2ed419144ea. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PLA500091510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8299bbfae54bb34e616ab7a5b96090a62568b18b6476a8e4e6529c30b0c23e26. 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/QZFZ32163518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81679b9ad8c816bf6ec848a10b9d48287c8a2f5f5ee9faaff4dd1bbfdf00a774. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLA508001204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8663eb949072a25ce4fbf445027e22c7ba07e6dc4838221eb9180352f0580af5. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/PLA500212218.
Byłeś, jesteś, będziesz (Holiday 80 edit 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3d5089046ef9642ab699675a037191792a839f27e5645e812eaeb0e912af8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLA500222903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a4e87ad40d2ed14c967d1a3c6eb798b674e68dda2f8d87fc41bb6d47594c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLA500222908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4de776a6dc526ff22e1dc405dcce3881ac0788fd9afb772f1d6ab3d26f58d. 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/PLA391605214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890196d95156c28bdb02ddf30adac5c02cdb7176f61ae027900e832e663fd5ab. 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/PLD111500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a2a6b1d1f6363c4695cab4fa8eea6ec473088041b4d5e305b131a06ef5f1f4. 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/PLD111500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2d2da5733785225dd932f2a81d000e74284333cdecd610d568763cc353aa8a. 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/PLI369293780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e85bbc144ea4485cf4936004fe7849ffec9cd36921ddcbd6b2d17f77c7b1f33. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PLI369293710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aefb218370bb4d7aa1313485d741fc99cb87cc10077d30861bea50adbbe961. 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/PLA391591711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49125f6e0a3df051437a5b61d090948e11fa7347ef9e303fb043b1373f751b84. 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/PLA391591715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86f9e667f013c544c3cb7fc4b715c17e3481fb36b517baf53d359dabe765d7. 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/PLA551400636.