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 0xb36d6fe2cf8bb49aa2c161b091e0de66ebfb8551b6e5ef2e8a4c65e9ac71f8db. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/939a0a55-e7cb-45f7-a0b7-e8b47abbb608.json and https://artists.proofprofile.net/proofs/artist/939a0a55-e7cb-45f7-a0b7-e8b47abbb608.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 0x24960bca441a1418850285537ecdde621873eb064c0dd01b1e5f342816453a8e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEWJN2200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eae9d35a5d822e2733508281ca400b75dd3d714dad7d2798ef5f4074cebef69. 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/SEWJN2200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d316175d95baa2c61dc823a15dfc948862f07d59856fc89ae3aa3ddfeec95. 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/SEWJN2200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c97bcb4675f39a406a781ed57163a411dc8517b69dad90a770875b05818ff. 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/SEWJN2200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3938381a289b7048f3e71711d089a1653e3af400e28d77c0283f17364b6974. 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/SEWJN2200505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf24b8cc2ce0284fc7641203115d94feb6d24f757402090b307fc9fa30dabe5. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/SEWJN2200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7b0f6fca0438e0e96df5db80b382a8651043076d2a240376a0b0fc70162713. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEWJN2200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a3200a1f02f56b01f8329648fb5cd1484e60a13c9e58f67e1aca0654122162. 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/SEWJN2200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fcb9ba326b19a15e564db859ba454d80e4673d9696e8c6830178a55120c434. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEWJN2200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59c301678e0e21fd51baeb820583b5e3f9bbc92311a15f3669ca545a89d2278. 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/SEWJN2200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a61069f4cf29b8e4626cdfe2c306904903ff8d169ec35377b999b9f228039a. 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/DK6KA1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f1ab2fc5a68d33da1ad98f272265629a6a5f87be4fb5893134bcc71f419b2. 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/DK6KA1900202.
Light Is Dim - Hommage aux frères Pigeon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024d776520ce190245ed3e9bb98f19c930a298f9e34fd99e4c9532a89390e6e0. 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/DK6KA1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7562f2fdb7821b252934676e117d995ec4e5816a66410f662e563db381f1f86f. 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/DK6KA1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f89d95231fbb87a08f89e4fc441bc0d705ad516bbf01609cc552bff43f7ae75. 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/DK6KA1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad30fc38904ac6e863913e7c7c7553f70ff54b9905d9753b1015cbc35ef5110e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DK6KA1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1713a9ffb7535c9f50883cd8184f5407eb58b0c40491461f72e9043668b6fa5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DK6KA1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc2c08db79d9a6bb8f8c06bb657f607508d01535e38f219daa0771f65fb69f. 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/DK6KA1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827da7dfb660f887f8b646aa087fc010083759f7c2b41458232d86f45ad071e9. 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/DK6KA1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ca23a8bb54f7fff00c433c9541246a70d7481bf5fe273107139feeccabd2ee. 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/DK6KA1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89ca5a775da6547776e6db1a1bd7152eec2239af5b339d81c03ab47a910f9f4. 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/DK6KA1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec235c77435b7027a8486f9f4dd415194a810488da9fc425eb07329b363a392. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/DK6KA1900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c15ec0b67d2dec0d225d5c24e0988ce75547fd887b9dfe7db6bc883b4e715. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DK6KA1900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050fa2cdd51e2dd97bbed407779d9eb1a605b2f1473598aa31144b6a0a2e440c. 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/DK6KA1900214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde251851fb3153ceea0c0a972f46a41871aa6fa36aac80d81a39907fbf9993d5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEWJN1701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ce2076721fe7cd0601a7c57b03074898223e1374f3a8f704e4d041a0f27b99. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEWJN1701002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f05e2088952b7b6b0fcb2c7f32e5a6b8625c4affe58c3645608cc2d9b452c1d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SEWJN1701003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af8f480cf2610f4d5d9b0a02f4a15a45b21a00d66b475966d50ede17f880ffa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEWJN1701004.
Ugglan - Farväl till Skurup - Lasses jig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6682f1e114f17f7a681882923fd99db1aaba1da38e137827a995b56a0d7b2e1d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEWJN1701005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa132b29171d47c40fdbd38dc25845d087ea0fec363fb937c1056b54345ecdb3b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SEWJN1701006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc18ce6bb79335a10cfb43d983066dfc20332d37ed64f49975ec6ab73be81ac1. 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/SEWJN1701007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46f6531b05ab0e4fefc73186446ddd878e2f08ac821185494473f779a28296a. 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/SEWJN1701008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0274b38d073be2742ab97c417ec67d69eb317de41ae92dcb78cb9994f418b0da. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SEWJN1701009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef869a8d306a95779013be12903e9564299dc9b8ee67680aa084381ea55c708a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEWJN1701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642fead9d1fbbc6c29870683821ffbd955e08c35d43bc208cbc9f5241fdb7038. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SEWJN1701011.
Light Is Dim / Hommage aux frères pigeon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024d776520ce190245ed3e9bb98f19c930a298f9e34fd99e4c9532a89390e6e0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DK6KA1900203.