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 0x843678d31a502d979696ad85f1decc1b90ad4832a0ee734c264f88284b103731. 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/76d086d1-cb81-43e6-b71e-d9f74155ce6b.json and https://artists.proofprofile.net/proofs/artist/76d086d1-cb81-43e6-b71e-d9f74155ce6b.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 0x84763b9929e4055996adae2bec1d71763ab401512b9155f1775e8b8e397bfc4b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/EEHD11500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5086789d4ee2525214db3e1f2376c7fd1ebcf25747aff5ec835564e34c948db2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/EEHD11500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888729197fb48b00d609e47e2ac6afa03b633629e14e9fc87b7b5e915430913. 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/EEHD11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5155f63a6fac604d5dd7a703e130d906d651c51225eaf0e0c587755ba493578. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/EEHD11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51030f11567a00254ef9d1a00199ac3c08105379678687b4910fe9082c44524. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/EELC11824806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf925c0cfdae7e18b97b331f8d5f0662eb627ceea3430f93c6cc237b38d898d46. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/EELC11824808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602bdc2c1af2741c3c25c4a82f95d653e59867e221e5abfbf30fa95bfc14d6c9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/EEHD11900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969224fba02ef0387b2c0ec922793261497ff7d0e410a3bdbc8cda7ae4f5adaa. 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/EEHD12300001.
Into a Dream (Music for the Short Film 'Keyhole' by Juri Krutii)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4545b5f005c5b680f941acfd544e39af66b66a273350c9f3355a089881875b00. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/EEHD12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03981e3e05ec815d1c88f62fce58fe39f8591872a38f54ffaa81c6785c9f27f4. 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/EEHD12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b007f4f395225d42ab642bbe68b4d04688b476c7ac10cdf1e3127f752944077. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/EEHD12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bb38f1d05061bc845270f9028fc0a8d463ed52f32f563f14a00300d9c243a8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/EEHD12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca2d0069785ff45c14dc099afa3fe41a18ac076c387698ede1b9a0cd8a2ddd. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/EEHD12400006.
Wet Monday (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aa826837b8f8087583a7d03706d4855112b466d0e87ca85e87a290879c11b1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/EEHD12500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdab80a1576f885d2c18afd347371cad8808ee598a580ff06585ad6df5110f9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/EEHD12500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073efef44fc9ec60c390563a4ed1abacd59623540e9e4fc0810ef0226d4a624. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/EEHD12500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a74caf01fb07179ce57413a25a511e48c39782bf2f1a028b064fbfe4bb84d20. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/EEHD12500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdcc8925dacbd003a762404bb64464ca178ae5fb2516ffb0e657d2e8b1aced8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/EEHD12500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa471b66004c560384f69f1a51b553435b1018c1fdd12f147bc2ce444c6cb5526. 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/EEHD12500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74451e53f61a49ce1f5c9d70116f33823455a354d71461060bf8ebe418a9df88. 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/EEHD12500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd300f093da282bf4c80babd0c9c0cd9f1fd1a7bfd4a1083473a750ec9b810264. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/EEHD12500011.
Tallinna Tehnikaülikooli Akadeemiline Naiskoor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e009fab677130e92b4d4aedec2d84372789fc3478ecd9beca5fd99f8a2c52. 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/EEXE12200001.