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 0x42bbe2b02e4c789f93defd13b5b71085a1cb0775ebf3bf03e83262f19121e21d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d599010-60ff-41fc-b746-2d4ff43fe7fe.json and https://artists.proofprofile.net/proofs/artist/4d599010-60ff-41fc-b746-2d4ff43fe7fe.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 0x2629ea9d0f53bd72efb2684b3dd55c32f83e289a006cca15f916d30e02a196f4. 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/QM42K2389694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded08e2ca63d6a09c35894cf8f7b865ded40fd896f3f8e8a4b44bef7b845aef6. 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/GB8KE2415519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f3b485a690cf756333d14632bf6f075d367a3122b0f0f37c5c8e7f7b8a626. 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/QZPLR2493194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e0d770c9e245e3c03b27d003421a07cc4e38f026300202d9120d01fe772edc. 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/QZPLR2493195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975790900fcda3d86f95fbda96bd4fbd9a7cda902edf6ce28381e9d8beae2654. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZPLR2493196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eac3557238167eff889902caa0b6c3559e2a245a041d9ebf125e1f6c3831cb6. 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/QZPLR2493198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21605578e83d08bcc51d641f564ebe174d90e27f464a655fc8e4e092152468c9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZPLR2493191.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc3f9b5010e1ea6b3f0a63226ffbcda216f73f9898f444f12a66e375745a70d. 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/QZTAY2379884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4c53fdb03bd589d9203d52b264a930debd66704eacf21eba159dd0c35978d. 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/QZTAY2379887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2f870e1551ce07032c5c00106c0c4f37e519becbf231af79f36eb7235bb4f0. 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/QZTAY2379891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b962c60ce5372ed7a467cbef388374452fabc0adb0c6caab2daf7bb9ca4164. 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/QZMHL2409982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ecba7c6b8f7d8aa804ccf7646936b4a0ec55f64312832f29a801e6b45711a8. 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/GB8KE2323791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5a88beb173b9dacfd18ac02a39300944ac547bffb66275e660d085d50b78ae. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GB8KE2323792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf865a04f5e87f19d68aa40611526ff58bb0fbe5da3d55b59539769830a2980. 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/QZMHN2348328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d6be5a28b8aff04ee50b6dad464eeb583ce235d3f5d383e54ddf68760d961a. 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/QZMHK2386505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5810769af885fb92f82f45b931409a996aef18a2a2972887ace850676be728. 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/GB8KE2416713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf47ab872d4041079cedda852b34612989409e5488b8c095109d06740a440f. 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/GB8KE2416903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0689ed2283d414d28cfb1ebe3c4d6f4696e013374f68c27eb2ccd774e4b593f. 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/GB8KE2416674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af43d856fdc93c2f7b1eeeeddfdc7046cf40fa78a113e939dad07df20c6694. 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/GB8KE2416898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587851dd2b12a94690041319e3bbf6dc819a89511bcd7260e3e2538e283ea79a. 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/DEAR42465841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b73a4e2c4456147bc59e04693c7d6eb26299d508ddbb9add48c3877e3f71f98. 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/DEAR42465920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a837fb200f2337bb734a6b2173f4ebd317c5698087bbfc28ae13634a258dff. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEAR42466184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b9376b37b8158addeb0e55a992e4ff5f0d4875e192838312a6945f23fa6e3. 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/GB8KE2415517.