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 0x0e71d30ec2113e1a15da97160ad5d480e17cced0bdb837fcfbb3392af230e04b. 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/29927e05-aa08-46db-bdd2-802ed9d2912c.json and https://artists.proofprofile.net/proofs/artist/29927e05-aa08-46db-bdd2-802ed9d2912c.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 0xbb0dc8035ead01d0941e1163deea8a34f4bde909f3d846ffc40daedb59cc710f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/NOPRR1708030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5973e28ea4ac6d7ca75dbedab5d4cdba9cec34bdca8f6fef4e18e42edf0e95d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:54Z), 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/NOPRR1708060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef73b4627cad908c09ff318a9672aeac05c4c9e5ac4af4d4de2ce4c1f94dbc08. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NO7MM2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e7a19f5c58b54f62165e8510145a5ccfff8ff0f793d4fe546d5933bdb63f5. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/NO7MM2401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1780ffc39ad44f9de9b922a6ac066d7c475a896406f3aabd34c86505b83df. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NO7MM2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d879ec3767ee502e476afc99223d6564e751dda2b01745c6d2611bfe27a8e2. 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/NO7MM2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8c5d25e4a3a5b2580a7bb8222165e90e7da890723bc4f4514432cb2f48cdae. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/NO7MM2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4180af4632c3cd7d67c97a6d3edf357b7361b9b304e3951e93b7caf33b086cc0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NO7MM2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef73b4627cad908c09ff318a9672aeac05c4c9e5ac4af4d4de2ce4c1f94dbc08. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NO7MM2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ec664cd035a0a70cd4bdcfdecc7cc7bb455540a83a8c4a27ecc0bed21333e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/NO7MM2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65a9e2338985822042b0a7a205644f96d136298eff058ea3c7f5a8c68c5e06c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:44Z), 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/NO7MM2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d879ec3767ee502e476afc99223d6564e751dda2b01745c6d2611bfe27a8e2. 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/NO7MM2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776109aafea10e82e5d0ce37d4fb82f90f569e7abd2b1b6fa7ebfb1e9023e284. 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/NOEIA2028070.
Folk og Røvere i Kardemomme By - Sangene fra filmen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc101a4bcc6cc2beb32c051d987291318eda8dce33621781fe1b1dd528c602b4b. 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/NOHMA2230020.