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 0x0ca81d870945632be3b44dab42fb8cf81fe8331eb2e2c5ca3feb384fcb04473b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d7a57b-09bf-4dd9-b023-8974417bcb78.json and https://artists.proofprofile.net/proofs/artist/57d7a57b-09bf-4dd9-b023-8974417bcb78.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 0x896a0a208c8ab51609ee938cabc26473992b7b4e8f1c53abdbe249026a178132. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FIBAR0400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76c0c08da811a5823d300d22b8645ba0cb618a564a77b7e0a8afeb1c745267f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FIBAR0400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3663f65eb0662092a9f1efa3e9e537d9fb6342b24ce4805ea3231c058c7c0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FIBAR0400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd6b01f6f725c42b88f79144a051ade770ab8ade81ad9acf311927b0492720d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIBAR0400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab803107d750c1bacef99c1abe04107b9908117b092c9c276f278c0dd8e4a3d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FIBAR0400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1d18b2eb8dc851941075b4a8f91879936cdadbcd54c10a9e8626049b4896d. 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/FIBAR9900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64f2d558cc609a215fd0211b326670d1df7f7c0ebd4099430457acfeb686e34. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FIBAR0200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45be9e5edd7679203bb2e5cd0b42a9ca52f3db864d1161b1dabfedc084fd6ee6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIEMS9200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcd3e931d97075b5c3f0e0a2eb980bf40ca9ec30a3eca552decebf20e368b5e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FIBAR0400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af4163d60de8e8b28a830561ee64732ee4f983d139aa323f249a7204c604440. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FIBAR9000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1e3bc22210e819638be0e6c822462132ad007bd871e81025d8f841bd48756. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FIBAR0500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab803107d750c1bacef99c1abe04107b9908117b092c9c276f278c0dd8e4a3d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FIBAR0400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca1b15312d24cc55a94aa1f558bec05cf54b3b95bfabdc1d1b56ef91cb07395. 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/FIGRF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0203ce9254da2854daf57d04b0231d9bde8b3f53627557eee2c395f72f742551. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FI78M2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcecffa30e746582098a7c3d8bca5d3fc201b986ad982845345d218d43bf6295. 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/FIBAR1200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473f5bf71ec3f2e1be8272179b75df678540983e473dd6ac945e880d28cd082. 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/FIBAR1100088.
On siitä aikaa, kun radiota kuunneltiin...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c61fdf2b9e9a0c41fc0d77c6e5da93ecf07e91db169efc7eaba8667f8b34c1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIBAR0800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca59ddf675320b470fa3133fe5892ce6ca6f4bd7aa15e57d74a02f8c8dfc94a1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIBAR0800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d1589d7738ab7899ca05a41c7fb307539934e58fa2f70bbb63e49e1675b73. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FIBAR0800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7da106253345eacd1396d8497e86cc404d1e26c1c655848f8f711bf13a0c07. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FIBAR0800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca3787ae17679b6fd9c706baaab095d701708003cb79050ca1fe8b5312e9536. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/FIMGM2500020.