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 0x6ee7e9e0d9bf5c9044597fffccdb9b8c8d70aefffe250a9bf5f5c0f90061c54c. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12ecd9fa-6910-4aa1-b83a-ed233a60234a.json and https://artists.proofprofile.net/proofs/artist/12ecd9fa-6910-4aa1-b83a-ed233a60234a.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 0xf35feb46b268466ef09f50f163233b038c837b5942930af04241328aa658e74e. 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/SEVPA0601002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624f6cd17e69f54b5b3ca147164b61594f5de747af1f7b672367e66177ceadf9. 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/SEVPA0601003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723a5070c74c4ac69d53a12fdfcc024a6b24f4f153b00b91f95bcbeead643c09. 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/SEVPA0601007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726975c14fd6c73c9da91317283e46a1b63d5b4f090f1b7ce078195f23658764. 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/SEVPA5003701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f4c2eb52d7d41cf5b888673ace6b48729231c649718d405e04bf9a8039234e. 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/SEVPA5003703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186f8e6241faeb51de442ecb993e24103369c9e4557e4fd92436b7f58d36af6a. 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/SEVPA5003706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d42f3e1733b01a819a28dd037ae711c9ba77178f7d07c2ec26b678f1029dee. 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/SEVPA5003708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313e8de20a1d9147b2e19567c6f8f931bd30af56234eb20eecd65f302843194. 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/SEVPA5003710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4067b0b51df817437a492e449a597594c7ac69dde3d006b8e440e8da3748808. 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/SEVPA5003711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f05cc38e9358654445a8bdafae12ac35ec252cb8b88bb708522184d46ef1cb1. 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/SEVPA5003713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e4910d69727a1f289d7d0c55a95c1df9ff869a8338efa35e51eaa6be74ee0. 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/SEVPA5003714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e1b380c5e1b9278e448f663c1b51ad837a65347f16e5651f486428055767e. 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/SEVPA5003715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82367b2e0e35a1169189e7af0e17388f620b583a45bf6e3408062c55a1a39c5. 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/SEVPA5003716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a99375aefdcb3f2dbdad84634b9890b0c61f3a77ea2095daf70a01466fad5. 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/QM6MZ1435580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab198325847ce9a9a0419a37ed08ce62b7ff73c75ee94aa618dbb8181ef5dac. 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/QM6MZ1435582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04ff4fb6cc0577dd6fc839ac2947abac43b26121d83be6ddf44f8e0291a592d. 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/QM6MZ1435583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff92cceee6230ecafaa34138a6d3ba03fd3bfef25f91f4e2d0e60f12455f7065. 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/SEVPA0600202.
Andliga sånger och psalmer vol, 2. med våra käraste Gospel sångare (Samlingsalbum)