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 0xfe2f7f8f73a9aac5fe8191d408645c6845039bd710c364351f41aad15add067d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c64ab4a-f28f-42af-a435-2f22e30c5c31.json and https://artists.proofprofile.net/proofs/artist/8c64ab4a-f28f-42af-a435-2f22e30c5c31.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 0xb45249e16e88c138b1a59cc1a4d50a375e99982d38d7e62689712052f06232aa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU7192028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5564a90b2e836c1d62b53b6037d0028c34186923fb03a9cdd96c33a8741a5f43. 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/GBSMU7192029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa501acd98a3bb45ddbedea99b5324c43c7aa04fe04fee90e9d2f41a4aadc723c. 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/GBSMU7192031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bc53aeefebef67e1c440cf6cc392513ad69d166448542ec9f80fe2e0b161c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU7192032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bbd1fce7a50669e8ed05ad476c1186f7fd17b9f9f05bb3ee556743d9b4da18. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/GBSMU7232756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546eb65ea25fb2eb0a5290f582cff26466ae2d7bb2f3c7a425d3930402f1e5c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSMU7192030.
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 0x3f27e69794e040ce3dc934fc5dffb0a01bfe35b2caec6552e320e85bb44069ba. 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/GBSMU7232454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c8d0107a37c21666d79e5abc0b4c2fb37cd26d835ce619bb907ba01b65e60a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBSMU7232667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eeefc50ed4fca113c8191d3b3218e81ba732bd93562ff3e147aba369b14e40. 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/ARG710300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766c186714aaa077377051d35d7452c5713f49826b2d93a46984f6a3878745b. 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/ARG710300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd08828f358acc1c1fbf720f85d53dc4aabf08b1a5b02b0ca7208c2f791e62ad. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ARG710300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48df771b1f80ebac804b9c5662d9bbeea37e45caff463eec4a33b73c7f583bb. 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/ARG710300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8064a70db95f11b63b68bc3da3353e082ea5b6d5c64fb96a6b18209ae9003a14. 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/ARG710300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845d59e4d76086095125e5e650ddec1d6df72a8214c685751cb9b13cf74754cd. 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/ARG710300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a7c83c47fc267b118d0a67ac904ace87981a77560a1928278f2542cac3a1e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARG710300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef26b0e5abad64dfc7c79a07d9bd11f97be889412fe9790f90a42d709ceda7c5. 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/ARG710300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255b0f2f5a493bf6b4ffbe8317eca67ac35772420d7f8bc9bf4e2a14505fede7. 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/ARG710300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82019b0e43778673fcfe4c538b6fb03bb0b79abb0e7594bcb397c31fabfbb8. 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/ARG710300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162596b2c4f59ecbf15a301d497f4d6779c952466a33630ee48a6f08c9612faa. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARG710300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab1371c7b2d3e25523dcc324058880bce405a8601f68e806e7445884077ec3c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARG710300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9312ee6b95086513cf13f7b9d120baec3348d666f9d387882a90319eb8d70212. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ARG710300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ba7dba5976a9ae497cc3c4c88deae62aebeec72beb9ccbd9e5dc667c957f31. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ARG710300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8df7f7851772270edca9d777013d3a8da19702126dd51afed1ce732e6280e82. 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/ARG710300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093b66b54bfd9be17201b3d2a5f09c74d851928793c1a71db3e02d75ed917f1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARG710300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d43b56e5b6727ea2c8958de9930864c11fb6b749a5ef68165dde20fdfb7305a. 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/QZ5AB2357370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162df217ee2f76f0f52deb15b1e0665a6f83dcd36ae04ce119365a80f39e96e8. 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/QZ5AB2357373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc867b1799062e53431dffa0ab9d8eb018be3329395de433f4363d113a792f38. 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/QZ5AB2357375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d51e0c609e5069b4125070432a3e9d5d6de73e91f56593cff3e3fad0d2463. 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/QZ5AB2357376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305ed7f7d6221782b6ed757db23359879ab010df4c3a28f803dbe1f7b3861541. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB2357377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8ccd46acb1000ddd223f80934a6bffa8f6c05c0d0fd1b0d240ffd1009276b4. 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/QZ5AB2357378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd010ce851e523f14a566cb481c9a499433b1eba3e30f0a475303cf79fb11b2f4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZ5AB2357369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808dd56c751fdcdbf2a5f96ae84e162d618789a5a82b23a0f9fe0ac090725bd7. 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/QZ5AB2357371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb8a9816e6a71d3636e3adba8a78b1668eb3a9b730f08fe4aca94475e11633b. 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/QZ5AB2357372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b56efa9a423b3adb65af78d897fcc4149028a455122712efa243765c9235387. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZ5AB2357374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f0c9e5329ee954680756451d5c06020c26553fb14d6ae9694b6fe67ad273bc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZ5AB2357379.