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 0xec6014ad7f4c3237252422d495cf9aacecc406822d64319bbf6ba243495ed379. 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/b22675ef-990b-46e4-a9ed-5a2002d9e0b6.json and https://artists.proofprofile.net/proofs/artist/b22675ef-990b-46e4-a9ed-5a2002d9e0b6.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 0xf885fc2c6ac9ca425ae000f5187b6e39ff2be616f8e3cc35ca3dbe9799aa3131. 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/SEVSZ1302005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5794319b9704423fffbbc58512dd61e878c4a7f3abf132f01a1d7366921a43. 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/SEWTC1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8f6be2f790a9fc2546bfddef570facf6ce83d7ffbc8b44f45415bc44e75a4. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/SEVSZ1202703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc320e248eb1d6756119e07c963f3e0f3d59644ea04ae588c7d1c85419bedef14. 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/SEXWE2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8754c6710c1fe97915f5e54e66405ee96b597f01d87939e55ea5d9ecc7668c74. 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/SEXWE2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c52382758e113f6eea810c3a7f3cad55d6711692d4f6a9a84c5720e82f16906. 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/SEXWE2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1a076e8fc86f0e88ff9116d4dd17f0c2c7030ddf369a515f03e41acb5606b9. 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/SEXWE2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc822d18f472db4f05a7f823d8677d1d6fb28b232753101005639f2d5b427f9. 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/SEXWE1700702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef5a01c8d5951d90872ed226962846f92f36efa23ab14ea27662e309055b9cc. 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/SEXWE1700705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eb40128aabf6f9c715e6db6723a474f0f47bafa5eee30e229ee8596f9e1daa. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:16:18Z), 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/SEXWE1700712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffe24488f0e38c695b24f29302d625e502de262bcad96278caced8d72dc0722. 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/SEXWE1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd81499bc1bfa96a64e7f95d2d81abde4adee06243acd5af3751f02a0816c3. 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/SEXWE1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f140050b5c0cb2627018ebb3f53a4b07873a89b44ef2e7838b7e5d4129c050b. 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/SEXWE1500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e0e3ee5d5402c8943dff7c68d311b02b09dd28202ffb6279abc1d117ae37c7. 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/SEVSZ1202301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4359c743238d720dd51dee2b4f210e1cfc23c3b7e95a78d0ab496aed043871d6. 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/SEXWE0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393b66996ab070911c82ea33568f73410a6e866091dae9a467abe7e7255d8993. 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/SEVHR1400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1218146ccecb33f3569aab11c318d327d2406d09d8a9b81a104169648c0a6ea5. 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/SEXWE2400104.
Är du min älskling än - Saxparty Medley: Zambezi River/ Dardanella/ Muckartwist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc320e248eb1d6756119e07c963f3e0f3d59644ea04ae588c7d1c85419bedef14. 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/SEXWE2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd524f1778e80de2c4f05e0ab39cebb4f88e0ed5472aaf94312138364dc571. 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/SEXWE1800301.
När vindarna vänder / Sven-Ingvars medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc39f9e4a5aff2129382f52c2a7022a0f8bb796e95c6874861702df6c18694f3. 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/SEVSZ2001511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b22b8f9510f8eb1bd535cb08f6256a5622b35c72237168e6df21e1721348173. 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/SEVSZ1501302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34a7d80af67e40df21d4010f763e1e1bbcfb91da5136c725558eabadc01d94. 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/SEVSZ2001204.