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 0xb91603dfeff6a516657d8ca82282a5caacd25e1700fc41418ca96c6ed0066495. 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/feca6806-5e5d-40b6-9ed6-23590912bfb8.json and https://artists.proofprofile.net/proofs/artist/feca6806-5e5d-40b6-9ed6-23590912bfb8.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 0x967a975707e0a6d1cf7453a92872df4e7a68c09141754bf5adb7081e37adcb6b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA81882469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb637dadb1e051b4e8034ccd154d6999b05aacf6fc7a87094ea99a49ab5128595. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA81882474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c09c270779f2d5caead83eeca7e75c59ee95de369f3dee47a0280171320f51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA81882476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff675c22479f3b6327a31e6bed099f660a98f485cde03ed05521a8d2660ce57d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA81882468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967a975707e0a6d1cf7453a92872df4e7a68c09141754bf5adb7081e37adcb6b. Chain 2 (Bitcoin): anchored in block 957844 (2026-07-13T10:17:20Z), 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/QZDA81882469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727c456df9f5313c61005fa17019e4562a044cf5dc03114e9b3f8c7d15a2424c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:06:06Z), 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/QZDA81882470.
Bartolina (feat. Apoc, BLKD, Kemikal Ali)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd524efc53d16342db8a0958e4861539a300a17fed6091b6e9b26e7d06443be35. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA81882472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b46039a293dabf10eda332bb7be5bd8b36d40c027bb180bfac50337fa69c410. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA81882473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a1cab2632b68a772c6b5683e679d185bcd06e0675a889e76aead3f03bd3a9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA81882475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e51576d8534a76a24a1868951ec2dacd91d41e03d76dc6c17e207460a9099. 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/QZDA81882478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e775ee9b228480f66ccdbf421d6b25bbf0b8406aab15ced4709f4903591ce6d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:45Z), 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/QZDA81882481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ef512a846c7f9006f47a396222b15dafea40672d96549382692d5857a5cca. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA81882482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28f1d73b62895b1b7e1fbebc9228e8d7eb77a9f180fa6519c645c48bb952c8d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:23Z), 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/QZDA62076773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd067deaff7761169d253fa687bcf33d7c40d53c36572919ecfea6e5093d9b6c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLR2055965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c081227ccd965394cb92a0eeb1ba0ecb39d3e2b89c2e2031db7441882503f84. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:53:42Z), 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/QZPLR2055974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e3bf34b61fe43bc264302d3b2371fbbdeae1ed201a2fc0a54f6d7903fece1f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLR2055975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf86baeeb712a6f8164a912f0350098385058ec1fdac1af6b742477c70616cf1. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZPLR2056113.