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 0x339546e2c7b57337f1ec8595feb698a16f093e44bad9f2bd0b45766a822b5c11. 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/670243fc-8b79-41f0-a6cb-af28c7ad32a1.json and https://artists.proofprofile.net/proofs/artist/670243fc-8b79-41f0-a6cb-af28c7ad32a1.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 0x2f01ce682956b0b91030f27c6a6a05b4088fe3420217e31e8277ef6d31d407c7. 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/ITCX31700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fa6ffa6872094330c0833a292c69a3bcf88f9893bd61fc0f87c68e80a688ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITCX31200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596319ea20c432af03d454230cf8b95d5070e5bb5f3b08d9efe6071e98719e96. 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/ITCX31600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb914227cc2a2b4599fb639e7fc5aa983564284690396a6a1513bcca92afb2b. 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/ITCX31600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864fe3a81e84173a6c8f2a174bba0c9a3fd5c43f5ff0a0b1e61bb54f88744c3. 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/ITCX31600009.
Scary, Suspence, Exciting...Cinematic Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3a9853cf606ffd8a29dfd893ae7c0a56db1c8d3ba743ff64b8385736242eb2. 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/ITCX32300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3559a558e0ea96e2889d2dce7f38303da0b74f3a81158c4fa72d642f4e39ad3f. 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/AUKDT2300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1993ca401f51be802ef47eef8619e72691695dc4de84c5d6a899304b1a85e. 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/UKR6V2310684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25401040ff68f0c6de309ed1d0f69f9e68005556bf5a5729181b0a22a3b0c9. 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/ITCX32300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a6bb1fc32c86bddf6b14f588716046cbba756c81987e24b0007dd105a57b68. 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/ITCX32200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbcdb59e4eba3bfaef24934018108fafe3d342e91336d537ba348c5e3b882aa. 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/ITCX32200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6403053a419b12c547f1c355ea097a30a624f1982d027de7cc59ef7c0ef65275. 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/ITCX32200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498a552774238b2f008c9c0d89fff215b2dda546848eee42e3b227a717cc27ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITCX32200005.
Christmas Calling (Jolly Jones) [Piano Cover]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e9e5de14f5653d340c19b5f0fc455a40dce28e25506e584bc3c3988db70265. 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/ITCX32100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf59d9536672f978162f73fd097ceaf912d6cf961c72ba5dd2350e72339b0722. 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/ITCX32000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b2950c2f83b95c888f06adc5db34b5bda6a1fd93ae1364b93de068f68a26d. 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/ITCX32100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b5adacff9ee381d3cb5a57e72e3673ef59ab4159a2f41275cb949abceba126. 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/ITCX32100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41a7221e6343cfaa5a7618c95a0f7af63ca00099ff72fb269e9f0d8f991dfe5. 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/ITCX32100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9b59d3c1799f5566f3ed3d287484219d64e59b60dbce29648ce9be31cd073e. 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/ITCX32000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3339546e9135f2f52a36965eb7dfaa06ada0f793eb170721671f074ba42f885. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CA5KR2080673.