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 0x421686786e95a6a6fde9985f510f9acd53ff29c145edd644950f0c0396460010. 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/87c4aee5-9f84-4c1a-9f83-ceea31ac20fb.json and https://artists.proofprofile.net/proofs/artist/87c4aee5-9f84-4c1a-9f83-ceea31ac20fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitar Stories (Sally Wiola Sessions, Vol. III)
Reason to Believe (Feat. Jakob Algesten)
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 0x49ae60a333f12ccb99f4cb659c10c3628a54264316c8988e6f3995e7605ffb84. 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/SE5M51900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4559da040c06476fc927e0479c34c4b24daa242500e8ed48b21915fcf6b7b12. 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/SE5M51900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4f703f6079cf1423c379575c1a4bee75eaf5f10b6ed4f27d1fe24f0156405. 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/SE5M51900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caa7bb153c5143e0b19924f991bbe4b7a84b419e31bd61b9991fe60ac4bb464. 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/SE5M51900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4957fdc0a43e2437dddd035499094fdbc6eb162f4f9f05ed906230f9a98a148. 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/SE5M51900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c2dadbe13dcb75bbfd0e0066c4fcc6e2d69dc8850fa092cb472b399e91f811. 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/SE5M51900101.
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 0x5d7d16b156008032e85a49f0f567bb00681d35b8b94d237b68361474cdbb6ec2. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SE5M51900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f0547769bbc021d9c83143e767a28d2a90aeffcab23b35295ca8f3f7e3f9ad. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE5M51900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561c7da1204a633ce8380dae7990bb78fb890fd6b03494617f7a3a1ef6841b7f. 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/SE5M51900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcc29d87f96cfba68e5f4f040f62c7c8d6313586a7812833e779ac7ed644260. 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/SE5M51900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07ee3ab39ee350ed6dd50b25f3090ca7a6760a7d3ea653fa5a581a075675fc. 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/SEYEP1101106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b078fd6fb9a60ff2a1dfc1b42da00062696594db187c8ec9b893a056367350f. 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/DK6KA1001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c022675661caf392f78d87aadb08801c1d6961ece3addb656d1a7a1be4d2d5a. 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/SEAMA0500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961909a6b39ac3855c3e009c16d3265cb7823eab8adcecc8143b4cab2e6cc11. 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/SEAMA0500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7543faf1fad1ab68ccec5f9630c2114a829b60cc49225f48d46229be0b6efff8. 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/SEYNI0901603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2be3adfe4f5c27d3f9e91a97b73f3bb2508fa7d7314843ddf7afd36d86c5162. 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/SEYNI0901615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef071ec9b5bb96147580088247920e02b39fe71d2ead121df73627c80d2d00. 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/SEVJH1002006.
Jul i Folkton - I solvändets tid (Live 2010)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66512f79e777ec629282fea5fd655cf18a9b67ccc370aa1e60acc1c48b54133. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/SEYNI1100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46178cc1ce8e84655f7a4088a07aa738597fa6dc694ab896e548162067cff6e7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEYNI0901602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d3c289552f1f4443aaf45ce5ff26e33bf5d9c835a184757ca7ebb366c9cf9c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SEYNI1100408.