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 0x2f770a7d589f42ee375f8d1adb122289842b36ed31db7cab0bc0940fce1d06f9. 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/13f7831e-a101-4f0a-9e8b-951ec4d0fb94.json and https://artists.proofprofile.net/proofs/artist/13f7831e-a101-4f0a-9e8b-951ec4d0fb94.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 0xd5fb043da47fe4d94871758e345ed040cb3280bde7c3d960009630b70020749d. 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/UKZGC2309538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026ba83b08fc19b92b655134b1bf7bb1de8d3469b392737db99138fa4f2cef9. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/UKZGC2309540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c1c384528f538be2b6e43de4a7b86e5a9d77fa8472ad8e7972d47ed99ef8d6. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/UKZGC2309541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90eeb4e833c9cc61b64f51c60bcbfde043791a83c32d2cd5ceafe3f9063d004. 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/UKZGC2402895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c713defd0f6be56c02878149608c73c8b6eb79fe0849954794486acb39179. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2405961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baea2e3400dbf30c9357ba446f2b40cfce25ff8a7813b6e0ac16cbc29f1ecf0. 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/UKZGC2406175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940a1847de530c49c6e703512580921a616c58c84c4f348c976fe5bd07be0c0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKZGC2407351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c18861dde4a42a6c20e804e5d1181dfe9554799a4a4c97119013a17af3cbf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKZGC2408169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba7e3234105ac38f2e4397a329f5883a3ca7af6876d950da4e828e1478a9d4f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKZGC2410517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f90bd5360d7feb1c98ac7cdb40cfbf57e08c31d49d89e193b627397a39acf5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZGC2411160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56a999ee01d1c6e1407ab51d667d2e177eac7d76b9562394e637cad22652529. 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/UKZGC2410053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e23ada7787011845c38d4fed3d0bd92113a82e49603cdc20094aeaaae2f96d1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKZGC2410055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8dc4b6ec765a33067c6cfa7b3107178ee094842f98dcbbffed114f8ca12897. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKZGC2411275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e5c5c860ce4c204bcd87a2701f18efc90fa4f14b9a6e784ae15b1bfc1d3b25. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKZGC2501038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa32101deadf2b8ea26ceffe7d00abbf77c5cafad90d0d759d5408e061e1b40a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:39Z), 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/UKZGC2506368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940a1847de530c49c6e703512580921a616c58c84c4f348c976fe5bd07be0c0. 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/UKZGC2407351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7523e8de221352f5e7ed682044e1f70b55c09cc3f4fea039772c452ff362ec. 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/UKZGC2404367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90eeb4e833c9cc61b64f51c60bcbfde043791a83c32d2cd5ceafe3f9063d004. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/UKZGC2402895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bde4286bd13940b5afd8ecf3cc580e18150e99a2e1b4d3c0faa7010a4b59c5. 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/UKZGC2304710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0013a712205354141ac035a01478286c08a943d086ce68782e94740cb54e5833. 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/UKZGC2402079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baea2e3400dbf30c9357ba446f2b40cfce25ff8a7813b6e0ac16cbc29f1ecf0. 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/UKZGC2406175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c713defd0f6be56c02878149608c73c8b6eb79fe0849954794486acb39179. 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/UKZGC2405961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31562432382d7dd048634d1ce3f5be5650ec17229eb22342b532efa9d2d36d. 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/UKZGC2303046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7898b568e1e40895c5045a2f17a8987bf6d4052b3340fecc67298133c858111. 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/UKZGC2303047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33964a525676954b6e7d1195fd107d69b68fa0a456e1a098da5643a39f6c3783. 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/UKZGC2404268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924b14989385cef82740bb5f62cdd125eb9dd766bd4cb94b636a8ab44b4f651c. 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/UKZGC2405689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547a3ba129b18c7627d1d6293250675f58dbc2185d19eb41e502923ad1c83e8. 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/UKZGC2410244.