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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152b27933013809b4b89fc9f5fea81a7ac83d5a39f0da1aed1961c0e5b716ec. 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/838416cc-5517-409c-a3dc-d60390b2ae97.json and https://artists.proofprofile.net/proofs/artist/838416cc-5517-409c-a3dc-d60390b2ae97.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93187921ab7517e6504144873c939b8eb9e7492e51a20cf95e07651e5212c70f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ1688898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe652e4f3cf12afc6f8107b46d43030f907eeeae7462d05f338bfb6368b82ae4b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ1688902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78629d4f8943839093123f9400665a98db5834856d34ed6552496f04dde5edc9. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/USDY41939653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652befe68e64bcad473d338213e97939ef2ee71ff6cd777632697d7a29be758c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY41939654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f350af03af410c9c762e1fc222c73cbac25fbc1f80ee73946dabc55eab969. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USDY41939658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef18ca5b7b30bd3b279640fe7a0a69d261d4560092084c4af3ccae9cfa25a3a1. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:00:48Z), 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/USDY41939662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e27d692345ba41c3847eebeb8c46ea9824be3696a023233e84fb148091bb1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USL4Q2108790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e092f87a07c02e021851adf47b3101ddfcdce8d8e5e90c70d271a3c5716dfee. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82360398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cc1998acc59a8cd4d762ddc4c469d613c33bc2c6129e75c0fe3fb4cfdf4287. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USMH92393769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67264553f642288b6f553178633cae0437ac5e0778a78ee01c84be84402ca4e1. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM22391317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2453a9bb8f05d082dcac31d4d472c52dab98c125db0fa5b3c119c95ebafc17d6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USDY42407094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4113d83f2b461246dbd56e144c693d11d711bd8353667ecbed0e0affba46eec3. 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/TCAJP2585589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e27d692345ba41c3847eebeb8c46ea9824be3696a023233e84fb148091bb1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:58:04Z), 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/USL4Q2108790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2453a9bb8f05d082dcac31d4d472c52dab98c125db0fa5b3c119c95ebafc17d6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDY42407094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49110dea5b7657fc79e78d67020e3e3112b3483aaebdc0cdb52ad38548a7c4b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJQ2504981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cc1998acc59a8cd4d762ddc4c469d613c33bc2c6129e75c0fe3fb4cfdf4287. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USMH92393769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea67421b857dc07331fcf5073d6536b6a686d3ea906b682abc595f072907a711. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJR2505016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e092f87a07c02e021851adf47b3101ddfcdce8d8e5e90c70d271a3c5716dfee. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM82360398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94108d929b7aa968ba3cb22d1ba814eaadbc7cc598fdc801de4fcb404cc9a487. 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/TCAIZ2400572.