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 0x834b67ad4d61e256ae1d4b564edf6939c9225df98110c3e2e67fec50abb7cfc6. 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/95e5e544-2822-4b91-a493-598d9d51e582.json and https://artists.proofprofile.net/proofs/artist/95e5e544-2822-4b91-a493-598d9d51e582.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
När trollmor har lagt sina elva små troll (Trollmors vaggvisa)
Bamse - Världens starkaste Björn (Signatur)
Luffarvisan - Fri som en fågel (Rasmus på Luffen)
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 0xfafedf1320cd97982448cb912b672bdb4cc274d040cc48a0078f734ed211b128. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE37J1504341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ca959e057285ef0ebd2ac7ce38a2cf4943efbf352b760c3d19897b3f9f90fa. 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/SE37J1504330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa485a2180ad23f23d24633630dc404faca95ac76b9476245a8821204909eae. 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/SE37J1504492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc33f541d3b717ee8ef85d9dabe393079a75e0e99b552b0e7e35b64a64eaa0d. 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/SE37J1504340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa485a2180ad23f23d24633630dc404faca95ac76b9476245a8821204909eae. 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/SE37J1504492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0310dc784a451a4d7483e96d21be4a71229ee86500d76eefd8eec3e5e580ff. 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/SE37J1504498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fad417db60fd0d85e5bf00e2be2321d3f847bc87e50eccd5dc2cbed6ce21e5e. 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/SE37J1504334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0e7e945c646e39eb13a69dbb82b8cbbbd1733551ba02e9f0b65569b27a42c. 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/SE37J1504495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0310dc784a451a4d7483e96d21be4a71229ee86500d76eefd8eec3e5e580ff. 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/SE37J1504498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca36c96ba9c4dada0e79f266a84046db91393ead97ec2e853bf1399270313d3. 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/SE37J1504500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0429798a996234daa17d54e44df1ae61c241be3f5e7d179ddde5e34bb2ed8. 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/SE37J1504502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafedf1320cd97982448cb912b672bdb4cc274d040cc48a0078f734ed211b128. 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/SE37J1504341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a0429798a996234daa17d54e44df1ae61c241be3f5e7d179ddde5e34bb2ed8. 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/SE37J1504502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0e7e945c646e39eb13a69dbb82b8cbbbd1733551ba02e9f0b65569b27a42c. 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/SE37J1504495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca36c96ba9c4dada0e79f266a84046db91393ead97ec2e853bf1399270313d3. 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/SE37J1504500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc33f541d3b717ee8ef85d9dabe393079a75e0e99b552b0e7e35b64a64eaa0d. 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/SE37J1504340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ca959e057285ef0ebd2ac7ce38a2cf4943efbf352b760c3d19897b3f9f90fa. 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/SE37J1504330.