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 0xaf2dff92b309646b6dfe640aee39a99310caad3fc8949cd218dbd5e396a01a44. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28462ff9-73af-4259-983d-3d533f86f272.json and https://artists.proofprofile.net/proofs/artist/28462ff9-73af-4259-983d-3d533f86f272.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 0xf22e6644b7c163c31d22f6292b23d20fff646839cc40194d8540438238536d4d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLZ542301860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585861945c7c3bb94d5f85e948fc147cb8bcb89a97d7df45563f04f375506a8e. 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/CAQOI2302824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645ce4b2381279c61544939d6ec15db4d9d7974d009a7e97c74042eca0a93480. 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/NLT2H2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd1f6e9e8f32d5f967a44718d35f3b7a6ec6ba00ccce6ddac357a2cfaa85c89. 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/NLT2H2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d0230fdfe6ba126382ba54892d67ad56edd5812702d9a3cddbae801e399fc5. 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/DEN062300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a79c30a8f1ad29acc0e3545650b0c3e7c910524eab80196dc97f0c4bce94fa4. 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/NLZ542201114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fbd23b3bbe1705157fbd95fdd69251469534f8d3248798a7b2f98ea3554d8d. 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/QZNWT2171819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b67113196088ba54178540444428e5cd3b0491ba338207142da27df1e635fe4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6M2140118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593b31307fe1304ff011ad12472ba2b93dec8f52f47d4582d613f592e67a8de. 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/QZES62110621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90543095266a6176f8541bb67c0e9302ca8a1caa4b188655e6962d9aaeeb1ecf. 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/ITG412100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa10ea9ba0f7363de969a71ecf22be07bd860e8bb6f9a0ee9d421ab671d6ee81. 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/QZFYY2111313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc434f27afc1e35dddcccc18d76b12fca602e67d611be1db18b110e2d457c9d5b. 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/QZFPL2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb106960f5bdc4cc1741ce1974834978f2168f6b8b1dd35107c9002616fd2b407. 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/NLZ541901772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed210104a9debac0c14bb1f01118f46f9b1d6094dfff1ac1acf738d5deec25ad. 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/NLQ8D1900564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528cba9de2ac4680299cabfcc0b5b5fb03a1a3ae258a723f4542048fa7d71645. 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/NLS3R1800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf435cef71996cb188f159e1d6200d7476567ebea01225040b77ff5e4df217026. 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/NLQ8D1900316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b357581faf277dcbf491adc0155c566ffe8d2d1261587d5eb56de07e88cc9a2. 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/NLQ8D1900299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741564d6319de965e45b953adc78d72095a163260eadf1cf23c9674dce4b33fd. 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/NLZ541900776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d36cad0e48900d983b972674320ba4c6e8ec626e38347e7734f9b05ac1ea9d. 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/NLZ541801626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d0aff24077e3174444ec0a451997240094ace9d6288ab3fba16e584931bc7e. 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/USA2P1850123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09c11fcb6f87a9402fb39761fbb45a68447ff253b944be741101183c4d8084d. 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/NLUW21800649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6289a6fe428ebcae6d0014fb83c7e60ce1cbc1b26c59a8109d8406041080ceca. 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/NLZ541800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033d6b2e74d14bba5db89a338a13c825746e757130fb5380030499c2b6e8496b. 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/NLS3R1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0df5801e2b7449c4aa106cbc2f60a9f9eac12599068e972c7a4e7f5f5dc685. 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/NLQ8D1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c95cbd362d75f82581a869c8af516668d49d83e1e707660424087f30bbd071. 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/GBLV61640764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d67817fe120f510ddaadc841e9a130a0a4ccf1503f56544f948ff25982feb44. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV61640765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f3347d3c6807731d91c7bb6d7a1cb4d1289981d8b127db88e38801873194a4. 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/NLZ541601018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250880938f6944728ee911e224d5d3b0f0ca19312f0a114dd6dad21b65f47684. 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/NLRD51608057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415be64370c09ba3e6087baa1382639a9d7817aa2d7d54af9551f61511596977. 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/DEPI82325323.