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 0x8a7a859a7d181c5f7653751e562ee20aba91bd7b86ac883e1e97df753c8c1fae. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07328a7-3d7e-4e56-9b1e-d7bccd4d1a15.json and https://artists.proofprofile.net/proofs/artist/b07328a7-3d7e-4e56-9b1e-d7bccd4d1a15.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 0x96b0c77495af9bf03f47767977202d5ea349e73f769342f57a2674d115d16582. 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/SEVTG0301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9df5549e539d5a2e31014d9df80ca86b62f8c3e7e1192da8b7678a1178460b. 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/SEVTG0301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3586a3622f97c37917808d59ab999de5708cb7f606aa22193923266e889b1e. 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/SEVTG0301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd01989ba069ef0d14c408c226f9d92ec64f49f0e62e06a33b1836103a31361. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SEVTG0301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764f044476c3834fd5065b9f168b3c698a2cfa07a600d04ca685c4e43a4efe3c. 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/SEVTG0301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69f3c7136ae74ca413d577b962f1cbd3f051e8443b08c38d6b235a3699c8b02. 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/SEVTG0301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddaa3c182004473df83375a12148d10c7e4a97e4b84f128bc5d869c93f47089. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEVTG0301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e8c498bb279760851a4ac7f73170cfee9d7af6972c7502b56689581ccedb4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SEVTG0301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9ed0b6d3ce2406c1ecd93876f9fb53734b8e83567d3ef3786e4216c93aa1d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:50Z), 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/SEVTG0301060.
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 0xb507757e72c99d8cbf594277b73b8c1c8e9249cd0acda6bacab3da183e274081. 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/SEVTG0301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3401ea38684bcbbb1a39d6d00f1995fd46712f613dbc948d28d1cb66d0c3861. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SEVTG0301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3d5c6cfb59e70389eff21fd78ed5d13c2e6c6aff1627afc8b71ba3be88b5fc. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SEVTG0301120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02625da24bc1c1c32b240880e3dea196a8c3808b4ace8e22a211fa63440457cb. 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/SE6FF2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c64f8e6cf61221d4e16c70b4edbee70bd087825e2ca9055f97283a6302ce5e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:20:32Z), 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/SEUM71501834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e6bbedb6e91fd81da621ffd37010b2481e7cbcb96113c3044f03b1537825a5. 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/SEAGA8908010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d52b6bf87c5879aa19032b6e741065547847573ddc30f398ee9207f9f5a6c94. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAGA8908020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b16a235121c55797f75d607a23966531a58f557244c11f1b61c36cb0618d35. 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/SEAGA8908030.
Barn på nytt - 25 sånger av Georg Riedel & Astrid Lindgren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7674d0a1cd28b437fbb2dee6424cd5b7b28eaa96a7c441d464c2d39fda986023. 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/SEBIA0300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fdc99dd29c1f92259f84c1b36811c81fb512cca895050e63bd43fe76b764dd. 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/SEBIA0300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c182da9f1c68bcd575905b4f025f0410e1a55edd235c37c9bcc99afdb34c14. 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/SEBIA0300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad641527aa4d90ff257d1d52d2fdcc0a1bd19fe0c162e169b2f8d83f8095f0de. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAGA8908040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013e350c874fdfbbc0a1921170c2e2dc772891a6164c48f58035e6a05aee7872. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAGA8908070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7b8f06c887f0c5829b8995ad64c995cbb9213366b2ae802c9487820009164. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAGA8908090.
Resonanser: Swedish Choral Music – New Perspectives
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b55c06462c4a48941ab05bb78fd34ba610687fc9cd6bf9ec7258c133d7eaa1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SEAER0814030.
Slåttervisa efter Knis Karl (Arr. S. Lindberg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffe75a61224da971b2042843bdf938ee482bc3d71f95456fc403469c93a380e. 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/SEAER0814100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a43f1a4476347cf5aa2cc0948ef96fe9bc32f1396d3b31eddb350c7df2f057. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SEAER0814120.