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 0xd1285ef764ee53379d609ff5aa6a1ea4cfb207eb58e352eca1bbdd7c7210dddb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ce9e155-84e2-45bc-a9d9-ff6ee2957aba.json and https://artists.proofprofile.net/proofs/artist/1ce9e155-84e2-45bc-a9d9-ff6ee2957aba.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 0x938168ca49c733017f49beed026cfcbcb7f870601565a6d521d19a4925a8c172. 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/HKG732148145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7041bc8fc96dd328de5c2961cfe9c2dbc11ae4424d8b3e57a0353e025282312. 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/HKG732317446.
天上的星星不说话 2022 (母亲节暖心企划单曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711bfaa0881e79ab053b7534cdf024caad35208b33c01ba934fa4acbb9102986. 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/HKG732221191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6374cbca161127c2994b2f79465c80f47e15ff0a23dda5dae8088bd1501f748. 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/HKG732267732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0965540ad67881146d2ed371aeeac2257e55939b1d0d49457036bdf55d29dc19. 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/HKG732296655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5825d90770d4d00a6258f48a109c29502c339e32ac7ae4ccf64e712876e5eb1b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202376981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff704857af3a2861ade64d216949257a984201461e43ebf9c76c48218093909. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/HKG732460601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb9125fc89793a00513430b7018a02dfafc7a7f9f3cb473a71b679aba859929. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TWAE32501209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb209295cfa5f5eaa546d492b0077ee6f0e2e4decd9438be163c3256d18f8c5c. 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/TWAE32501214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0692ba957813e06cd8425d6388a89daeb98f6c365a25c015c4b2b3f005574602. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TWAE32501215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7152e331ba9a43e23c66ab29088461f197f1350dc32e25f2307b33c55e7758. 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/FR2X42155534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e82df305610d5796d3630cc0ab29390ded43b71d82fb9eb1b57354489808d. 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/FR2X42155512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadec19bdf2d9bd4dfb9c5e8baffebf1e4fd394e3c0d206c2e223c73cf58d41b2. 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/CNZ611900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6be5b6e0b2450f00e545a3e2667a8c21d81b93b538ddbdc44ade11babd315. 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/HKG732332482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7ff3be27f4c1960829350471fbda9c60526f48efa754cb03a76be75aa4427a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632301254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a508dd45eea32ea8c4033dc85a31cae09759a87629d8c8ee85f4c0c87bab30f. 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/HKG732264952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6758e9f3b2002b5ed917a04c426d5a69f2414a70ea16f44617dbb96806ec5c4d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FR2X42157961.
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 0x4666f422b1e49c4ced529694d3c70761a3e5156ff52455a8f6e651a9dd7ae92c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FR2X42158014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c77bfd325a30cded6e84cc6689e4f5d9938b05dccdbcf698d40dd55d54d9547. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/FR2X42157047.