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 0xc46c963c4e722db19032588e1d1e1a8ae06961ca0bbf08059a058f43d728f4f9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc215142-e479-40d7-a2a2-3589948d8bb9.json and https://artists.proofprofile.net/proofs/artist/bc215142-e479-40d7-a2a2-3589948d8bb9.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 0xd0abf54bf854f0c45da44d4cf076a87104f07e75596e1dff30d2989dd7cccb59. 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/NO2VT1101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7d75f23060774c91618d756e0a67813a8af4abfcd134d4364755fc4a5a2615. 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/NO2VT1101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018cd53f4317fab6404ba276e1168aa6e63a3571989e72cd83a8772b10400bb5. 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/NO2VT1101017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145ddfb0948f14dd3dfb574d61455f18511340c0b2b7a5917d8a6866a7feb5a. 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/NOX9X3560405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e26a041cb2d8f5fb7f56738a3c92f45292b042d118967e75c94a799865455b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOX9X3560408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af6d27c7fbe25ec709aa115fbaf81d4fd97ec5b091922f56536053a31455aac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOX9X3560411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2ed0c2ba728c68200a67f449968e0bb9c92501b4cae8192cbbc46ffe875f15. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOX9X3560412.
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 0x71b656ac067e1b708b2e53bd4c5fbd67ea99a40db204af78f3ebb20be788a88e. 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/NOJRA0706010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6fc8bf35df4f4d5daa00f68c6f5a7e617fa7b401559570b5338de1ca52833a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOJRA0706050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05372e67f4520d6ec5ccaa1dc59e3916401b70b313f761c253f5d75597363f4b. 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/NOJRA0706080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1452f94ba61149714e9baf8c478ae8b34ac61217eaf07768d1cf149b994aec. 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/NOJRA0706090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c61b034e84f0849f16fd9c6772f14f8677c314b0c4866c256d4efbe7f5ccbc. 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/NOCHG0501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5b7f33a94de8e2b2fdbc0b7e27b7ea36dba8eaf07360ce877913b0c28e5070. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOCHG0501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2526b51c5665da2bb93be3a7261e36f7856dcafe40d35fb1c816e4763211db50. 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/NOCHG0501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137b6a68823f45f49d367229456fc3dc25a8e2d4aa72cd932c3582c6fcd5184. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NOCHG0501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b89ad7d2f00bd9cd0305a4946845bf9aff700b19ab2dee6cef141a6cdbcf5. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NOCHG0501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1867a42b2f73fbc8bc7eacf43b55c2c0ae772c96a2cb48d2adbbb451d0faf85. 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/NOX9X3115403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6966d2b44714126460ff42a6669f59e867f0d534e82769f2d9605c0eff0b27a. 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/NOX9X3115404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5405a07400e763da17c1650df1aad64c95391426c4f3d8fd36b3e68c928fc948. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOX9X3115405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746818da4d9dd324b5b06c2358279cda3904f6b0bb3b665300fc14f093fd82d4. 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/NOX9X3115407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8cfc51f726a1cf5b63dc03a2d5f844bf1100a705258a3590fe1c4496062fb1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NOX9X3115401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676f57223b6d210a0d9102785afebbe31cb0c753dda9f1f981ba1d5a9279dcbd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOX9X3115402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c1238d1739420bf77ab662921cc491d6475606ac15342e2feadd29e30a4aa. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NOX9X3115406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6125d7d318bac45cff5a72f7abd1f8014e93b9801846735a297d58ed2d77db6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOX9X3115408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92995f5a6ccfb54b2e0280ad138babc0ab03b33bb14da9a884d6deab0d876fa. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NOX9X3115409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ac07b1bb5209ea6bcc6c5fa775077b04b722d51c113e4bc385b9be97358dcc. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NOX9X3115410.
Musikkpraten: Rudi Myntevik om albumet ´My Dearest Kathleen´