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 0xa0b240f8886373e74dd6ce17d517ed4010301abcdc7795e19c38430d3586f03f. 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/24f83f0c-e5a9-4c6d-ac6c-69c2ce557a6b.json and https://artists.proofprofile.net/proofs/artist/24f83f0c-e5a9-4c6d-ac6c-69c2ce557a6b.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 0xce3e14d8b3e105bcf69920c4c6e940395639486e38e380982c1fccfacc9cdbcb. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SE2WI2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbd1a383eb8ea7d2b2a2712c8cc5d069afcd87c8801c9e2d0de7cb26800e29. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/SE2WI2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915aa6dab120bc2863660faee291f84494158c09c1def4981facfaa364c21809. 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/SEAMA0500462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e5be113c508ff109aeb3bfc5f7075a6a8d18fd389ce643e56bf7ac441214f. 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/SEAMA9847110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e72f6c5823d320302e9881526bf7f40457d61a18246dfca853ceb851ddaa16. 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/SELAA0900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29957bee5ff8dac32c6d289fa9b5796f0212e3ff43711d65a6786fbcc3cdbf8c. 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/SEAMA0700168.
Barn på nytt - 25 sånger av Georg Riedel & Astrid Lindgren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb87e4540ddfb70f73be364cb0a956b2f852ba96c883e0a7fb093850d406955. 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/SEBIA0300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47072aaa708796bf81b777fba8a5b625a18d164c3c096dd32b4c6ed6727d301b. 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/SEBIA0300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158fe128f623ef60fa7fbbaeba6d0029f060680f9dac6f5c8b06a4bd92420199. 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/SEBIA0300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5988dcf4bd5d0a366ce9512bef50b85613ae8a82bbcbba5cbe451644ec3805. 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/SEBIA0300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008ea4e5603c2009e285795763db7ad8d5054a6c10b9738a91d94a1ac1627fa. 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/SEVEM9801020.
La Dolce Vita (Det bästa 1982-2003 / I eget urval)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5718991653ca6507c8aacd0d91cf408cfaac111c5c8d9b9e3b6681437899d. 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/SELEA8901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20598fb3da00fd11fecba2442c53e6b714cf40873a4980457b9c36dec4059dfa. 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/SEPQM0800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20598fb3da00fd11fecba2442c53e6b714cf40873a4980457b9c36dec4059dfa. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SEPQM0800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49a798e4565cf271b6a086beceb8e53824b003ee2302b5d5fe2dab320fcbbd5. 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/SEPQA1601094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9b719258c8b1da84eb9bb4a94f6bb8f316d97998345328eafeca0cc51694f1. 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/SEPQA1601107.
Intro #I: Gustav Lundgren: Django's Tiger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47a64b218d2077bb6d1cf4e9ef69e3c7680ea012cf2af7689556b1e3e0737a1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE2QE1400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1fd9f41f54514b94ea76fcefc6483568a986fa0fe7e64a84dcd10f3958ce9. 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/SE2QE1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281298bb0b1cf09b95c65006d468a2404f5fbde970cf2a4e509451ce96f8610d. 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/SE2QE1400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f34f38ee0501e6fb80df515c8bec2f7985ad3d40642d7c0df266dee22f1ced2. 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/SE2QE1400104.