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 0x4c21666a0f1a30da40d349e0d5a4c2a197323e14b2d694c684fe7079d19890c3. 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/ae55f9b0-19b2-4cfb-b9e5-9522c98b64eb.json and https://artists.proofprofile.net/proofs/artist/ae55f9b0-19b2-4cfb-b9e5-9522c98b64eb.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 0xd97d34594eb9c1828922fd6cf92522c3e364c4077bebdff114b19b64ebad9379. 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/FRX872456173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8543ec97387786eba828a2605d45cf57f033457941afa0a6d7726f6ff450ca. 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/FRX202468262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8543ec97387786eba828a2605d45cf57f033457941afa0a6d7726f6ff450ca. 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/FRX202468262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae1f9448bcb544c1e3d26b2ff86c01962447af61e47c2db58b71cd67132d22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYY2340407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09103c4745cf0f69127b99a7a98b87a3f5f8769795d932515a4025e6245af9cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92347965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d6089bec88ed98e56abd8ffbb16d2bdb5bd306ece237c6685f7d26287bccff. 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/QZNWV2303383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c225830ae92727339ffcfe1cd7ab418c9f78ea709b23ab3d84a0e8068479c52. 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/QZTAX2205174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157dd70b5c15e5834e204721e9180ab0b117e2a86787838a4687251df77b6d82. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWQ2323282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51daa132626f29f47ea98fdb8cfc1adc73988df4d9d3960e0648f43ee7679b. 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/QZNWZ2247431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ee1f8498f114b21a0d5ec1c07dd3e829e8ee855b4cf2cc4c7ec2d73869f3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:02:39Z), 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/QZNWV2303384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157dd70b5c15e5834e204721e9180ab0b117e2a86787838a4687251df77b6d82. 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/QZNWQ2323282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09103c4745cf0f69127b99a7a98b87a3f5f8769795d932515a4025e6245af9cf. 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/QZES92347965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae1f9448bcb544c1e3d26b2ff86c01962447af61e47c2db58b71cd67132d22. 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/QZFYY2340407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c225830ae92727339ffcfe1cd7ab418c9f78ea709b23ab3d84a0e8068479c52. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAX2205174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae1f9448bcb544c1e3d26b2ff86c01962447af61e47c2db58b71cd67132d22. 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/QZFYY2340407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51daa132626f29f47ea98fdb8cfc1adc73988df4d9d3960e0648f43ee7679b. 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/QZNWZ2247431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c225830ae92727339ffcfe1cd7ab418c9f78ea709b23ab3d84a0e8068479c52. 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/QZTAX2205174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51daa132626f29f47ea98fdb8cfc1adc73988df4d9d3960e0648f43ee7679b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWZ2247431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51daa132626f29f47ea98fdb8cfc1adc73988df4d9d3960e0648f43ee7679b. 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/QZNWZ2247431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3351fb5e9383b84f645ff539e26ba6dfa18f44acd37b379b74d9cb16734cab. 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/QZMER2089620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fea7001be632f0bbcfaf7ab4b034ce7d06801e4f259657234b98b609367dc18. 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/QZFZ52152383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6377c055ff8fb4b7a2f1d4c2c06549e0c22960e9577f7b37a92841edc9444463. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ21988777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fca842e7d811feee61c72f5a0aa933eb3d9493aeab26782148bc9d7239303e. 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/QZ4JJ1833752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2417ad3c8ce05833e341b510f72faea264600b990fb7b8b1e78e24d18df650f3. 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/QZFZ52152384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b22950337f43bfc651fb6a97cf8656340bc613be70a24cad53e60379e700da8. 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/QZNWY2059196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22036cd1f644f4823900deec8c4f361835e3c5aa0e061ca754bcd08db966fb6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:41Z), 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/QZFZ42181428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f47b1f78d1e880d5c88050b3938eea471f04bab8bf3125280461a63b02a78f. 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/QMPKX1709300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f753c0578726b70a1adce1fc9db7b7e2de79ff4e73f2f892d35c138ccc2af. 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/QMPKX1709301.