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 0x21c2a35e348ffebfe53c89c65e429e872f33a58df2624242fe695504f7e31fe3. 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/28145eb6-8bd4-4a1d-91bd-d443b1cb16dc.json and https://artists.proofprofile.net/proofs/artist/28145eb6-8bd4-4a1d-91bd-d443b1cb16dc.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 0xc2d54e8fd11a463ce1f216bff4ee71e97552e300518a7b41e84876a7de0c676a. 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/QM4TX2411677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59577cf711175a9e66bbb117ebd275b54e61c5b7c120d1bc5d19ebaeecdc97. 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/QM4TX2411681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3dde2569996143be7cecb60e8be45166a09b80b189067fed89fa868e87fd73. 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/QM4TX2411337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702aee255e54d32ab955b6e272b04bd0de309ef861bbc3ce99eec15f2fe8492. 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/QM4TX2411331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08b36bcac2258d8fe25bafdabf05b2e7c38f0fe1f0ae928a497b26e4efa2ee. 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/QM4TX2411319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa1b6fadfd7ee8484fc70df526e47240a666805a11964b5ac564f874831344f. 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/NL4WT2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26712a44fad945d9c9285325b4a5d593e78a98d94e6a8f5165fe5ef99c0b021. 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/NL4WT2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5da2acda2eadb2a7ccf3bdd7e8643eb1d36d3ef39736b322425dcc3aef03d2. 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/NL4WT2300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b199d4bcc91d0a57ebb57de562043bcc9e093f3a66f2dc7767e20e62ce27c0. 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/NL4WT2300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c9c345c3272c8a1a63a18dc7eac797d45cc0936165ac348cf640ecffc73c16. 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/NL4WT2300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03008aadce5fa0c2306598917186b89439a9a8109ca65e27c8d10b50f22075e7. 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/NL4WT2300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70140e89fa6202949a1444133b3dfc597239c525c8ccb47578435e7a14925b. 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/NL4WT2300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834fc133f47ade0f7d9af648d8591406637d33088b6874b175aee1111110d7ac. 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/NL4WT2300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a3b53492364d8a25a13cc45cc30b1f64c1d282df82ef058afac2cfa8eb5b4c. 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/NL4WT2300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ede2adbdef6a0f967bd89bb2a1216fb0d9d2a5b10e34e1b6774f14381d7ab3a. 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/NL4WT2300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c0f455044e7a333c37241539eae94f9ed9d8b22c42a4507a5fcd3623bbe96. 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/NL4WT2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf378f77c7c133f72b58eb0b948136458fe4860168d1ebcd224b9125e1fe36f9d. 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/NL4WT2300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7249c54b47a69200a226884af9392de8f6ebd4275677fc4b624a3982a69ad37f. 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/NL4WT2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca799603b9718f16714a1ff2c96046879bbffc486e48b26b5bf6d7cd0f68c23. 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/NL4WT2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a0dbfcc83511fd4d1ceda0e80703b4dc4b356414c78e75c7577993054e06b3. 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/NL4WT2200239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56ed5868e1b400366e4467a6282643b3b64b1b13dcb2791a9c7d8d1fbd4d67. 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/NL4WT2200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bebf2ca2b26c7ca13326c9359356ba85559ac69acf67de7e1f16295eb6ebd20. 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/NL4WT2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70140e89fa6202949a1444133b3dfc597239c525c8ccb47578435e7a14925b. 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/NL4WT2300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48924550a294b3cb7500fbb7fd87f35116bece91ea1771741d6cf7278d8f0df4. 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/NL4WT2300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce8fbd86bfbd3dfca968d253365af3bd9a937d20599099d7a6b55a653755f0a. 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/NL4WT2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d539947d208b44b0ed1ba819ddbfd524b81e273b5075f54184400d1be04bd85. 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/NL4WT2300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6e9010078459b33ea10c1d46b769b0324114e65c3a1e3fefa3f15b9c967f8c. 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/NL4WT2300281.