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 0x8039db7c1b30b78fde318d9c009d6ff59885bd1b860e2feb7f11e0292d16a0b5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be9f3f92-b4c8-41fa-8a97-aef7fb23b1ab.json and https://artists.proofprofile.net/proofs/artist/be9f3f92-b4c8-41fa-8a97-aef7fb23b1ab.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 0xcc7c56730d1a78f30cd2fa41f48a379e6450eae14d9fdf43955553d0624c34b7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCADG1791389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951423882fb74fd17f04aeab476660d636d9c84f799799c075112cbd851ef1d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADG1791390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51f20c77a82c22ee7a0f096c89de6c6b9406ab02a818734b534ca77ae20da24. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCADP1813876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0db1b0c4cecb6f5431f227033c40b64fca40b8bd01d2573b85b8c2d8af55cf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADS1898795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d38b8dd0a8fa1ce67e2e2f5fecaae2cc1f38aa750d3e39cd87fbf3f6663dee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEK1986047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d9b49b14e8bb7ab59860b0bafd133d6b625cd3aa524367118bc0fb0c6e5734. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAEM1945423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb00d924b9874448105892bce5b9454337ff436b8eba90923c981754b79638. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/TCAEZ2044371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813b0b1c417f620e3e0bad2348ce038c1d9a32b7913192020c56c46c893830d5. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAEZ2044387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c920b9d644c8e1494ccc22470f3268ebff7c782c330364bb9975faf3e8a73c2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:27Z), 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/TCAET2025112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36121cb1e65feb2bf558d02867985b0d019140c8c57a421eacf8a9d523f0da8b. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/TCAFK2196560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd348fa51a732a65c446187ab6ee883d1442d13e275c55119383fde0b537cfc62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:41Z), 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/TCAFK2196572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e7a286b0d61e69d93643be5faef3f970573d7d98c818b92a6ba64d5bc6b26c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USUM72120903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae69e30212005ee5e6d70059bb6d68ca41b9565387db1ee6591229afeb9bea0. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USUM72203254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfd48ab465ca00e87cc3374a10cd49dd057dedd1af76eb5eea29c7b44b4fc41. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGU2316957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfbf39f4abf12c1d16173d2defa9a60db6b4e734b15db017e2f0c7502d79caf. 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/TCAGP2239192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380090a5f6771fd319ca5bbcb7fce687480872279d8259288d16bc110c2765d5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHH2312287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd038b126dc79e8648d8a43143345fcf8e6213e650122d87ab010c8401ef6e2b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAHH2312330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031b9d8a61ef0771bf07abed6433a1109dd145aa541413de637c355b48d360e6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAHH2312355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4808cd72c2be2724ba2c6971749a85bb7cf56aadc1f785d0cf080d9661341541. 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/TCAHP2376040.