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 0x9213d80f7c17277641897dd6bbc2110aafee02e7377ef7ff678a47778893a83c. 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/bdde9a8d-bc56-4a32-a32b-143e9eb74c29.json and https://artists.proofprofile.net/proofs/artist/bdde9a8d-bc56-4a32-a32b-143e9eb74c29.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 0x98cb70f95618fc874c0eb89ba0b252d41d5929919f69047c4afdf09fbd9c9e59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA011852330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36977b0d9bd81b4a6b7f2093abde96cfc8d1da16d61ff297496fa2875d89f898. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/ESA011852334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf673bca9e9fbd8363f59d4b6111dec17b0461e2a68b511a3d8a28559677d5c47. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ESA011852336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b54e33cbdcb0f5f52d47f9b2bb53452dc53ce22672cf37240ff7992cc05b3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:31Z), 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/ESA011852337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc286ad97ec185846162527b7a2c235e1daeb69f7bbec895de56da8c91646065. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:14:53Z), 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/ESA011852338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8535b9e3bc080e22924c6cd313a12a2d3ef2a499511fe4743ecef06f80e2a7d9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA011852339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d66e104da87faa5294d1fd2d5d7e149d88b54ccec4fe8ac08bf2a71cf161a5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ESA012211359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb4e725bd8bd8929a3d3e6401791718f55b73b05c72742c264085f260fe1e2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA012211361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbc21d6b252fcf65e1de3e469a73f85cee3e1dd0768fa5f078059ada09c0354. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ESA012211362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0195e31be0a04a3077dee0b111c48b51871e5752d2b2a0936c9aed825ad96f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA012211365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad6374267cfbf7fc47313b37927de098f2ae596f0d05880461ca67db2c81cf6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA012224112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd94672f7d09978a0b6af0a9e2200f66bea54d895ecc83522d2c079dc65e451. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNW72377689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3304b9d30430f6e0f0888ffb8365d57af9be7b4dd9a2e03d4318dd6b25703f8. 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/QZDFP2065977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e544ec1e323cfc8fda5d7ba21a7e5dde71f04779b36ad814b366b63bf352cbe. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZXLZ2331607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6c99d0f9529e979c9b5182b885cef637c9e24debbc50a151a59cec61b78ec4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZXLZ2346704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84987fee5aaa6aaa60b975e6643f6d9b43caae5f65b7011c969646a85c66da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZXLZ2361273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbe690ca9abc61af2d781715745aac1c96a14c7715a33751c7355234afc6f88. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ESA012333425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b962e311228b380518b43542d075ef18bd8eaaa922825402317eaee1f1c66df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:34Z), 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/ESA012333427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adb5a6c9008b2cbc5517b2f368ac9cebbd3a1abfd59e8bfe2fc57870cc3ea93. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:09Z), 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/ESA012333428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb30c94f3e4173af5e31a86e5a5d182a5a7aa68fbaa6bf12cebc615cc96c85. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNW72407648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c2230fec8daa83306db9ec308f943eb1576b8264ea39760612dee7b4d21595. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNW72407651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf03d95a0ba5161917221632cc46f699f30bd328eb84963a238c2397b300811f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNW72407652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab4933b74db45098f3e923281cd212b377513754149d9c5e7aefefde9f39bd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:08Z), 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/QZNW72407653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0988710971260bf6ea26e732940a2a28f10741fe32521fb109c7f7e1f8216054. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:09Z), 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/QZNW72407654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c5e9725f64e43ed0b73fb0bd7e4c08925fc8cc1c4d4a09f7ce14db9ed581c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZXLZ2521349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f442975cc5c6026e535357941aea172ded7caaad08e40a8f4d038fa45c2b82a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZXLZ2524797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd406334c3d91a564f5fdba55ba0f923473e70a0b457ac33c188d7802f9bbc509. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZXLZ2530870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe04315db3acc785b54d8b89e89892938d89a4f94d64be8656beba275b7f73f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZXLZ2543951.