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 0xa8bb8dc6199b4fee15118611948f08180e7bedc7556ad3d187b7118afdf116ab. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c15820bd-1642-477a-af3e-ed6b4d96e23f.json and https://artists.proofprofile.net/proofs/artist/c15820bd-1642-477a-af3e-ed6b4d96e23f.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 0xdde45f447d0287aa0bff260fb6275d0721742d15ba1bf4a2b21c269cd3861e6a. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:24:23Z), 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/GXHND2523397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9ec2eda12cd40759075bafc72737ab6ec10bea5ecf8f5fe6aba7f76723eeea. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:46Z), 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/GXHND2523406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f93c108cd501f219a1f113caabc65bb7609217c2a7f782643d588399e6860e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:34Z), 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/GXHND2523408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa0c661389e8225a86cc3463dea7801157d8c562b120a56f8f64b20f475c4b8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GXHND2523526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae05bed56fcb488a2c0110d6dd30c9f67fad8b56a4f26e0c382b576fd5280ed1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:59Z), 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/GXHND2523456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71f1a99e586668bc5d4a47770506fb493d00aa161b482fbd968a12ec809118. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:51:35Z), 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/GXHND2523442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d1e4258fd940edd265d7d4f02a235425d88293ff26e5b7f72aea3445a0e94c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:26Z), 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/GXHND2523533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473250045684f80d802da585d619d920f980232453a07c3cf98db93c85e1b06. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GXHND2523443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ecf4621d471c695e0c71cb846f54fe3ae60b9091070721011ee2ab90943a6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXHND2564230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a2be13f7f563178e7f8ef1b7e9a72d1476695ee6bc1cd39e5f95629c3b2138. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXHND2564322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d6ebb1e952ce0ca67b57d23271414e30ce4fc00250e1a92ba78eec9e06ae8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXHND2564295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d35f373a8e4060e346e7e71064bb72d9ee73279f5a39337800f890cd46f6ed5. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:34:16Z), 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/GXHND2564211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8cd70f2cb01eec31331ef7cd78d063e24566984da51cd07f64fa21624586c9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXHND2564316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c221bf42d9b5b5da8284496a6e503237a8cb18b713028c2a900834b5cdabe23. 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/GXHND2564308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c298af60d995dc255244e8f6d93b3a8675aec7e280b9c9645b79268be407a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHND2564319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2586307d7d4b471ea445a52586def1db2c66093d8f6c3c21e1ad026fe7abb09. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:14:05Z), 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/GXHND2564342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28a6c466e02dc7707faaec9754e2d45e3bf69e6accaef7494a9407a3c975360. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:42Z), 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/GXHND2564199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898033c2b4c12fbf0f505266a4478b9a6d56ae1bc9e1c8a183be14253c262141. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:08:19Z), 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/GXHND2564325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35550f95571613509fa604f267c8eb5985a767586a8d1da247a41ec4ae09516. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXHND2564223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1a7406f6840454fa1b6a645d75cc39d4533e4378178c8fc5317f459062fb20. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:55Z), 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/GX53U2622407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dda36274566aee75b7633085dd190481d67dd328f9d6fe3e96aaf9210fe696. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX53U2622413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73822ab3b2ccce23d620bc5a03e55462f655b99471e1616918a328f03a34da88. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX53U2622429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a77a54461af51dd86c78cf2b7de8fdeb04c296257c0e96b6c70c12ed8672821. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GX53U2622384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa146af13493c80b61baaa55a2e6bf45d55df55379c9ea72c650602c33e1c0470. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:32:09Z), 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/GX53U2621280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd436046ec687f170c203300e2381112a339e405781db837d8ef9f4dc2bb68638. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX53U2621283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3cb1a68c17549eb87c77ddec16809c750ab3646fab731145f32b4b926398fe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX53U2622404.