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 0x441ffff2fc79aa99f4f738fcbd1cb15de656d4f51dfb98f52c4980f2ddbb48ec. 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/7e3b45d5-0561-425e-a3a5-71be30c714d1.json and https://artists.proofprofile.net/proofs/artist/7e3b45d5-0561-425e-a3a5-71be30c714d1.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 0x584c9ebb5a00052ebf57a212a6e512cf215fe74139cd0a4c76f0007f6dbfd810. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/HKG732260348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8cc3c4d6a7496f6ad991092b657da47329fcf039e9f1830142a68fbd2e3275. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKG732260349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e06f4fc2dc3940dbeb26abe885703b894244d39fb71c255780e924c3b6485. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HKG732260351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf692da10683d2b9a76da0c33e611dd81557b2af416d18d2ddf905c09b1f3f08. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/HKG732260353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05207ab1b59a6f97834d8430d53a63b8de734c81652f7b3e7a465c31b5ea9ab6. 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/HKG732260354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04335749ad5e33976158c07e749f9ecfdb42d9bd6b5b38bb1ac03857bb001bb8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKG732260355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e21cf52d89cb8772884d180f74a7a118bf5de63042ca0b2ac6e7693c86795a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HKG732260356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d03b0b0eaedc9ec9b3344eecc99cbf78cc4589ad107d11768c4779e4d4cb3c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/HKG732260357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df30558782f3e299f7cc4f8ee3bf624430346f91edea1f605331f41a082126. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HKG732260358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb749e595218b3a9507f675e30ed710200acea17bb1cce088f61f4ecb6f28845. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HKG732260359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e06f4fc2dc3940dbeb26abe885703b894244d39fb71c255780e924c3b6485. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/HKG732260351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05207ab1b59a6f97834d8430d53a63b8de734c81652f7b3e7a465c31b5ea9ab6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/HKG732260354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04335749ad5e33976158c07e749f9ecfdb42d9bd6b5b38bb1ac03857bb001bb8. 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/HKG732260355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26809410da14d771e896dd193d1f7b84fd1410beeee35d9bda8ff35a287743fc. 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/CNZ852311953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118f9004753a9eff7f47687203856fe78e599db5faeaf620bdd0426f72343e2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852316458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8d61dae44efebd36d14cdf8e6f1a6c25b520ee64d19e33cc895955fe5fe676. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ852316524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6a07f66daab6859f9ce0559b8716edd2c83961a9329b9acd5d121949f4ce58. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ852316525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fed28111c2489ad46dbf17349a7a2bedeb42a41f0aa44c195bd54dc1bb70d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852316459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3dd460ceee0189350f697b0d32e7248035760f9ab455baa9e28b9c49ce7dbd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852316460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec197f3a3f4a4d7405c3d13ae1ba63a043dec177d9795d2d3cd672c37bb67640. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852316461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0b24ffa5845aef88ba1efced99bdd7595295539a733ffc2ee4cb16717d8247. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ852316462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d708ade9d8988011274f5ca0ff51c244cd88c6f73a28fdf330096674f4ddfeb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ852316463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf060f318cb62e0c067cde589de0fe71334422d1062873e7439c3ec250077b9a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ852316464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d731e1897eba9deebe551eaf57ad832834655ad1042b9f9dae482b427fb1bff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNZ852316465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2333052872c4e08b998c1fa70b5c9e18f0c9a710a6d4478ed0bae665791c9524. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ852316526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b16d71a06c0eb11cd0dfbbbe2e67232f809f18797930cda0c58e076d2d0125. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CNZ852316527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc7a8911e074a6456f8b3465ff48884fc7eb61379773b120a2e84ffa8005dad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ852316466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6088ae29368c60ec4c0b1fc6c0c715d02ecd5db327974fb877cb7195c1cd85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ852316467.
八方來財之江船入海 (Stacks from All Sides：Fresh Off the Boat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab8a03fcb6a1a79b6f3efb165c9dba0287c911462f492705fe4993eaa56073. 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/HKD012511147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba9018c35aad47a7184a84fd9cecbefd16b9cc8f9539ce1e119aefe02227889. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:11Z), 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/HKD012511143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1196d93708d8042af01ec4fa0caf63dc416664d466fc282c547a1963a253dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKD012511148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9c47fe2201d1d3e7ed44b81180b66adbc6fa01d6b0f56c6a946fc490c7348a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKD012511145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba2b631542dd96e8352982a043997065f7003c11abbb8c8348ae2d85fbe0c6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/HKD012511150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0840a9c2361d9abd8282e77914f620b0c5fe9000df953e77f103fc62be339. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKD012511142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44835e2dc0726d6954cea9720a699d6b8a09219eff6b27d7aee501c956c8db5f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/HKD012511149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76164e6990a4604c375281658261e22b8c0722a4367aa09696bb5553fb6e99ec. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/HKD012511144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe053d4a9987ffe048420e3fcef43bfac4072d4b54a2df19c05aa848e5a3c242b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/HKD012511146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841e51aaaa5b02279ffdf4bf05a2fc459bed706c3cce75a692b08aaf7e141ae4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732429504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c846e6ae5668079a46de01432c628465f5238157906e262f0b0ba2b5ea9e1f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CNUM72400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8e6e55f3804e0966e9e27b3f766b685f92ad056f55ec24935da680535f4875. 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/DGA0S2473476.