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 0x262a8cb1f225761d17eea50a300c04c7fdcaf7983f437dcd6f39c5967e8b53f1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b49bfacb-133c-42b3-b25f-3b12720579a4.json and https://artists.proofprofile.net/proofs/artist/b49bfacb-133c-42b3-b25f-3b12720579a4.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 0xfbbb23027421c02211a55b7234fa6421f8be731482d99ca39b474378499ede65. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BX0Y62400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf620a37c175985f0d2d2970d521c345e98dbdd6f24db14cb58d31f19cd5210. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BX0Y62500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099a2fd5bdc51689207684b7e068c05fdeb990422e964b223f78858772a6e3e2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX0Y62500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a17f0ad7a569cd25792c61ec10a134d4f87fae0c1b6a7a20dda638ff2392b0. 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/BX0Y62500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f75cd47381d8e4eac69cc698c65b7121a701301ac5a8377570191f3ccec2d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BX0Y62500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf620a37c175985f0d2d2970d521c345e98dbdd6f24db14cb58d31f19cd5210. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX0Y62500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a931bb07c0225a7bb6fffadc81e6cc7831742fce0650215a3b8b9011627c33. 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/BX0Y62500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099a2fd5bdc51689207684b7e068c05fdeb990422e964b223f78858772a6e3e2. 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/BX0Y62500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02975d1223951d60bbe99aad860bedd3ab12b5c57d445bcebd2ddb589c77c42e. 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/BX0Y62500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbb23027421c02211a55b7234fa6421f8be731482d99ca39b474378499ede65. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:08Z), 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/BX0Y62400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70eae4e85fe8f471b170e94c58bb93b82760dcf44b5f4ba00376e78db46e199. 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/BX0Y62500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c85385f10e4d68885269f475c8f8062a2fd66aa2d075ada72caa813beb1b3c8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BX0Y62500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0d09e484d6e82d9ec2e58b0f8e8799bb20b0a6b9fa20255811a1f32dc1e6d4. 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/BX0Y62500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ae5bb804e8b4204e79601b9e02780fddc9767d922e5b3e8892d5545ef0a0bb. 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/BXRFP1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4375385d7600dcc01472d826b3de8c5fbd44869e0c615b04fe1b0fbfc2f32f3b. 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/BRUA41800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbc31115f68dccb5a14d30587caeddcad766882f95478e21a7993306b6cb5c7. 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/BXP4R1700005.