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 0x8efa6ad5bb1b3bf70443db95aac59023c4c36b70c51f23b6f9b10efebe2f3e58. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d390d78-7901-48f2-8907-88c89ab4d523.json and https://artists.proofprofile.net/proofs/artist/4d390d78-7901-48f2-8907-88c89ab4d523.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 0x27a0616f088190585b8650d2cac64d4255180ce68ff10b01d534139c3214df57. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GB8KE2400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363b2af7a8d011a8ed4b53865469213fa37a4ecd169fc7bde451b5522a1b935. 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/GB8KE2406189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b82595c9959a7042a04418198f01215b347ae8e46fdd3d69937cf931942eb6e. 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/GB8KE2406192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e6e6243518e9c7bace9eb0f7ba4bc2fbdac6708d33756f29f944be9acb83f0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GB8KE2406193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca500c0d31eea2725129bbaaa3d1bc4ab046f2be5bffa5e4f0a0850c9758410. 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/GB8KE2406194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e9ad773cfce1794bdb68cb95fb3823568e618d341500457d0ec5316c8ab0e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2406195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5262a45147846eb2fd645b0aed5257320546af7edafebe13ebc3bc0864c89e6e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GB8KE2406196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761b840a1941c3b82f3f9dd604a1c0aeec8e21379b72535d6f84648157cb37fa. 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/GB8KE2417462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ebfa60bc27b7b40083739112b241ae20d8314629ead421948806a5c4156a18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2417463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5870ae40e84db0cfb6269596c7df935bbd45761ca6a065efeedb80d71fed98. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GB8KE2417471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b674a58b861aae1afa7b3f3ac0b3557beb7ff22a79a3e2f0ab85d95cee45b. 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/GB8KE2403147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2010293debcc51331ad45be6737250cb9ddf6d97be3439141f011b7a7a825d56. 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/GB8KE2403163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38987365a4ae11091317def312dad0e63fc7f12f02731dee7461e00499115d90. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GB8KE2400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ad900bf556439059e34e92f82c9570b44d5137d9ec2af8dddacba6303b06f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB8KE2400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241ff57cf8d1a79e94c548a8b95e38be5c86ca122f723f50e99d36cb05ffe52. 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/GB8KE2400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c421535ebe5d9336e49261f91dce5db835f8825d0448a0e287bc094f58053a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US38Y2421116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d6bd45a797315afc97c2efe541c0bcca84174d51b8a98be4ac5225608251ea. 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/US38Y2421117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b930d9ee4fe00b9eeb47f65f29195fc59bab21c721ca6d2ad39454e339d407b. 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/US38Y2421118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55493d5b8d77c3794dbcdd83e72d735bbe717cac8216d808e01ddd3db3898aca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US38Y2421119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ce2637a8cbedb86f327c69aa2855e63cb9a3ef1e04f37d444d3cbe46891853. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US38Y2421120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bb1425e0f9f2abfc3254bdec57e430266702345b53b2f75cdcc0f2aaf5ece5. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GB8KE2424747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdb3bc160b2c3841d226f3e4d56bbc542d902dd8288e07656ac1dc51fbed980. 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/GB8KE2424748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd911d83134f185a4505c57b865b99d9ff4b18a830feb1e721a4cb5d08c98d3d7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB8KE2424746.