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 0x8eb03c363892628a56ddc78f28ff0ce18f0c9cfe59bfc9c45723165b48bf379a. 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/b86b7744-5e96-4f5c-9d86-02799e1cd1aa.json and https://artists.proofprofile.net/proofs/artist/b86b7744-5e96-4f5c-9d86-02799e1cd1aa.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 0xb8af9ccba9d46694f3dd24c10fd642e443e25cfce7590901428a5c8ad7a14147. 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/DEMQ11701696.
Croatia Calling, Vol. 2 (Finest Spring Break Deep House 2014) [mixed and compiled by Bes& Meret ]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420dafc1d3ef07d7a3aa378948a63e99d992bd330181f21c440b9aba3a0f9d02. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEMQ11400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94142ac3c436cc2dd989eaa6fdf22a0d48b694005305c6299118c294a074fe1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEMQ12400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde010fe6cca743689a10e80e1608465a879b09f978b494cb98683b51e6e4249e. 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/DEMQ12400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948374aa9ad48736919795c2c38f19d3d48060abfa8c58ccde7d440b413397da. 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/DEMQ12400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cab5acd473a27d5f95ec1abaf3fa24b1f6e791e2cb37b8ec9323df055ea855. 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/DEMQ12400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36abe26e9336f3ea492282178f9a4cb8503bac8a3e6e4c38d6ba7a6173ebf37a. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DEMQ12400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94badc574d2cede733f5cdc6d55faa7b312b5eb5e54da499ca8e733f40a0b150. 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/DEMQ12300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa28b3b4324ebf7f935fa1f05954b1c0d878efae02c8626f019f74db6aecd6b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEMQ12300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41d628306a4c14a6ac327731a3bb6fb29f30561ac00dff6ebcfa1e926b83493. 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/DEMQ12300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17bb69ec4b44afd5e42cde976a29bd1fcab9aa549edae9325594eae46da3bc1. 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/DEMQ12300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5ce9beda77619c9a8e9bc1c13f99337b7ca3817a774b6ac731df530a9b3d98. 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/DEMQ11800226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adf5d5aee3f00ffaf3ef88ff34fcd1d3a651cf899c39e7eafbba277c03702cc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEMQ11800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff8358c65fdaafc162c540188a7122677066a42d6203fd14e27436b62b5be79. 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/DEMQ11600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a9b52363030dc4748198aa2a91e9c8c3d8be811ee0a9bc5dc668d4cac25cc8. 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/DEMQ11601300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78da67da32157d22ec1f88e3c17964edc688924e90db0061f16b6c2499cb3c7c. 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/DEMQ11502100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b16bab707aed6fe031e04f39bdb259560f058d674d58063014f634d50b9b4. 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/DEMQ11400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4b6870c760ae6640aaf4a8ea19ac695ac9605d0182b4a75e91468b01b31a04. 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/DEMQ11400657.