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 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 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 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 0x7f6a64453169a10fa1a1ce712507ed12c4bd8c1868fb10f89116cae412df530b. 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/USCRI1801502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef110f073d96b530e712c68e5d8342688d81438dbe9bdff4f9437139bc37065. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCRI1801504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f80c0b90ac72bf0c7a841e34a9f9dfa5e0bbb6d61c89594fe18683541133a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QMV7Z1500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3c275bd1b96ac06fc41b2e419a4e85c4562a2885c8742532da929433c8002e. 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/QMV7Z1500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423074a557cedcfdf5726049e8851937838c2df1fdd9cae3da0266395d65d3aa. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USWR30912302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb13bb80f57e382e9fe9828319abf77bcb0207d84237a6f03d6030095c4cbaf7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USWR30753244.
Sleeping Bag Records Greatest Freestyle Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c6d8b90ee51272855ab608df8a86ac9f6bdb40b256445f8168127a495412ed. 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/QMV7Z1600287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2411ae41cad2a3778128f9cc5cbfc920250237e701ecd396760adf4cb3dfbba. 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/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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9712f8756c9aa50d0d7fd982efab614d439aba813aa87a0a7a4c036091dba9c. 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/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 0xda671931222dcd5731911943cca24dda76d8debda43379561f8c7797426e246e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USWR30798502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dd325d4a6b952ee020638d9417c99b69714176ea3bdfd98b28300cc37977b3. 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/USWR39676607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d254e9b9d47ab2bdb9e1e952c9ea964cd909be5a300d7fe348c1537614bcb1. 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/USWR30798503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae1cc8bf10e0507ec7f68fa636c803515a8aaa80950f6d6cde266de0a95f905. 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/USWR30798504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb310099905b672339acaf7495c1a28e499e5f031d39651144087c63494391. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USWR39676609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e65237546057a313302d6e42344f6224d49063a1663285c870570ba7672e39. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USWR30798505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e3f1ccba436d5ab78814efedcb9137ec683bffe88bbd8c7f329466dce00c5. 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/USWR39400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa844724e65b1b68eda0dced3257a72a77a0645552f4d4ba6d510cc7a91a400fe. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USWR39676604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8595e2745213028324be037c1be068905854bc194a2f40c61e5841d0273d973. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USWR30798506.
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 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/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 959132 (2026-07-22T13:20:46Z), 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 0x1db6236770e9f654564e03a6793f3c97f26c8840edf1c5307d856db4e803aed5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM20701482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a065c3fbab0872cf1402aee86c215de58452290582a20e42fbb9f564f44ad2a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM20701483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68015f30555efeaae44539b0d3f61304411ea0917e0dafac654d64f7c1bbaf4. 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/USHM20701484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14d044d3d97338ee1c154501aa96664c41011ed46d8710de180e24adbc3439e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USHM20701486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680b258c4310b6736c0aa1434a646781aee1c178ab07c67dc3765d304caf8fd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM20701488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423074a557cedcfdf5726049e8851937838c2df1fdd9cae3da0266395d65d3aa. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USWR30912302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415a7a700d88d6cc5ed0bb258ec87ac36c6dc4e4d0e3616de3bf28e00e907a5. 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/USWR30912303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c76ceef80b55a6e044e0b79a9760aae95ab004aff3150acd9d1f7178852e8d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USWR30912304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a128e563262fe43f53eb9e1d7910c3de89cbb9663064bc139d874144a9138. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USWR30912314.