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 0x881ba39cef3a3ce780e4643cd6aed68a5b75c0cc2be6172764659a48d3b0b0b4. 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/ffae3b04-894e-4b7f-9899-5018e4d885d3.json and https://artists.proofprofile.net/proofs/artist/ffae3b04-894e-4b7f-9899-5018e4d885d3.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 0xaa6d8469c6a459be215175ec4a376095a6214c6cdb12ace786e6b1de01511bdb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:58:45Z), 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/QZPEW2421142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ccf52852ac85652b37b4a718188e39f0363267f9d2b2980f5c555b3d39e56. 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/QZVEM2382967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f7a7f5e3243e1be8d311d56e61a8fe7517dcda427d75b2788204afc9f66e10. 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/QZVEM2381703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35f5a94f7a29d64841c9e669cd756d9c0a8b6d1085ea7408312189d03e17b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVEM2381704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559af566aa7a440cc099e9a0834823a132e0603f15fdc2eff6e6f7c4911d8367. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AEA2Z2332278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb298d4eaa66fc3b9a0887043b84e5cb1b7f6d8c57127f7180f488fbef618533. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMEZE2199175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2021be80885b64af28b18a638e25ba2ca7bb3354c28c40c2e04b02f1b872e5e8. 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/QMEZE2105861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c44d0461d084ddf4b0ec076d28f34a9c66b098b83ebd0a9c7a4ac597277ef98. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMEZE1796466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c734d9d0b195ee3b16148bb354dc322cba25fb024f589e529327e65f849080c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMEZE1790432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542610540ebcb1deb170207685ab419ab365ab93cdc24878aac381c54ee041c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMEZE1766479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df3b0f25a134c4ba10c35d208ef293cf6ca965666bffba6ebae8519339dfd2. 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/QZGWW2054405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3f77699bb79d25743b080d19098acd4fb9a178cc7300cfc580a1a6426c2339. 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/QZGWW1986891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fc7b66e821ceda439a9c80401423f48eb064cf9f9090ecab9b5849d4baf161. 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/QZGWW1968243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5095b0b4b4c4de820b5482ca07a5d55128009cbaef0ac00a859067b2f5081efd. 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/QZGWW1959126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dce5313959bb676d60608ed8ed337794ec92a923d328804ccc066c988782fd4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGWW1959518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4faaa8b622ce7c3e02f0758197a10cac9899215e14ec1b24cbaf542cdaf2ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGWW1959132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711e63789470e27938898725971e35981485d42a50bbda618ae772f32b487e9b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGWW1959127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac573a8aaf1b4ee5854b3c755972508f28c4317e3f624a05a52107e2efd18f9e. 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/QZGWW1959128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8338727aab84d19d53a6e60b779cc10031a76662986cd24be32cb7c9fd3afe. 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/QZGWW1952148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7e6756cf05c6fe7fd348e1121e7489358292bf51bbdc15ab5d152784294d5. 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/QZDA82021547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba0beec1dc5486f39293fb8cea95c56b527080999f6bb7a5f867a4b326b3a2a. 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/QZDA81801429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37059f8731b047e32bdc49aafe8d06f32e0a6870d2c32554866c96148b4288. 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/QZDA81801430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492a741ee41f92ef86de270323790ee3c03ff876cba71842b38156d8cb979c44. 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/QZHN61985579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316b949cfb0cf0c0a6db4c9b01a9d114eac188c62b1642516b7a96855e23ad8d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPEW2108441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258c6f03fa7f32cc775a1eaef68a1b67acfcb24622ec0a2a997caea02cbc0578. 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/QZBRF1809634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29f6dad41a18506a3e9647b5186f07bb0611060703d754795c4b05beb32bf65. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZBRF1809635.