Gerum is a populated area, a socken (not to be confused with parish), on the Swedish island of Gotland.The exact extent of the socken, now district, can be obtained by clicking on Kartinställningar an
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 0xe9b6033d1abae86afd092c4041370b8c4924bf01b005804826d1c25c393f3fc9. 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/01685798-319f-4f55-9032-cfda050028f9.json and https://artists.proofprofile.net/proofs/artist/01685798-319f-4f55-9032-cfda050028f9.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 0x67c06e74b9c97c6b950b6770ded758f2f39f4ba3d7017a976634530eaf9a40ee. 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/RSA222305595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfdf172777af838c2a238715db9e13dd7dce60002571b4ee6499e018431e32f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RSA222305664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd07138d31218f5341a247b432e7bdb1418f8301c03a26c766aad48134fb2af. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/RSA222305665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd120b54d1a3b5ae4a8b39a75054b07c1d553479e4af4cfae98ea4ddba8d649. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/RSA222305670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ba1d92f649c3eed849408ff22fc5a2619118ccb5ac6d21d3b8448f8d44b66. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/RSA222305666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf694e6193958c8edea2a7de740587e4411af93ca4875fc77bfdb8e5614e43915. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/RSA222308961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e591e0b3f6502f841770ceb05b7b5239ac101da062971ccfbf5ff53ce762f5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RSA222308962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a64520fd7f6ed95cf10c667e95798ca48c0d0adaf670b3cc136783fd9df1e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/RSA222308966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b64c916656bf448e6137a440aa0f7d7f99622b21c16d6f0138a594766e9e6ad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RSA222309822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acdcf1695c3e267389626f219c755c10a42c72330f5918b1100da819a3f5dcd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RSA222309854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a5157e3aaacd91b9d590e7d18af1e4078a4b545c266e7f5b4852469903c99. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/RSA222313900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ee55028aac455853538e655f4ac902bd60a66ae8768a4a6ae8da1e76d36498. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMFME2576733.