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 0x6a59ea66ed859778a8bac637af8ac246b5fa2cf1ccab79faa18129a8d4794504. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eede4200-f219-46ee-a1fa-af8055038086.json and https://artists.proofprofile.net/proofs/artist/eede4200-f219-46ee-a1fa-af8055038086.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 0x7f6a64453169a10fa1a1ce712507ed12c4bd8c1868fb10f89116cae412df530b. 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/USCRI1801502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3c275bd1b96ac06fc41b2e419a4e85c4562a2885c8742532da929433c8002e. 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/QMV7Z1500236.
Sleeping Bag Records Greatest Freestyle Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c6d8b90ee51272855ab608df8a86ac9f6bdb40b256445f8168127a495412ed. 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/QMV7Z1600287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2411ae41cad2a3778128f9cc5cbfc920250237e701ecd396760adf4cb3dfbba. 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/QMV7Z1600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bcc0472d113babfeaffa21666b039d3cf47941efce40ba107ed546239cd988. 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/QMV7Z1600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3c275bd1b96ac06fc41b2e419a4e85c4562a2885c8742532da929433c8002e. 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/QMV7Z1500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9712f8756c9aa50d0d7fd982efab614d439aba813aa87a0a7a4c036091dba9c. 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/USWR39676601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ba730d4e7f35f4b4972cabba9f1e915d1d3e2492e1f9665139b0777267c9e0. 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/USWR39100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dd325d4a6b952ee020638d9417c99b69714176ea3bdfd98b28300cc37977b3. 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/USWR39676607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d254e9b9d47ab2bdb9e1e952c9ea964cd909be5a300d7fe348c1537614bcb1. 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/USWR30798503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae1cc8bf10e0507ec7f68fa636c803515a8aaa80950f6d6cde266de0a95f905. 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/USWR30798504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e3f1ccba436d5ab78814efedcb9137ec683bffe88bbd8c7f329466dce00c5. 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/USWR39400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2206b9f58d64e158e79ffc9d6d2b9d0f880690a74ff5dd4e39d2af41a3f635. 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/USWR30798508.
After Dark Freestyle Vol.1 (Presented By Carlos Berrios)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e13d9fe857238af804609bf2850cfd43abaacb145e67f70512e9d1cf53554b. 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/USHM20701479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86522bf8a3444ee265f234d1ff82a21eb80701b42a2e8b1411dbade1781dc810. 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/USHM20701480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa4514e08f84777289e959b0c599ec6d159842b2e4e57ae513fdf3b730d773. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USHM20701481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68015f30555efeaae44539b0d3f61304411ea0917e0dafac654d64f7c1bbaf4. 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/USHM20701484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415a7a700d88d6cc5ed0bb258ec87ac36c6dc4e4d0e3616de3bf28e00e907a5. 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/USWR30912303.