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 0x84759e20f2fd9dcc8bd14f42b62b8f72d78643af2df3d8b09878d1ff96392c1d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/292d4075-b3e6-4b96-a5b6-00e0787bc712.json and https://artists.proofprofile.net/proofs/artist/292d4075-b3e6-4b96-a5b6-00e0787bc712.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 0x0d31ad1919be75f94028f4daa99dc5aa7ee85788d302b0c478522c5297af520e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHZ32156222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d9c5e21daa6ce899320a491fae1ed8b087a60fe38baba4f89fd151adcb4acb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARF862200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bf350a269a04538b39d83a064b910fa29d7f2d8a2b4dc01d02f3c3392a686b. 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/ARF862200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d31ad1919be75f94028f4daa99dc5aa7ee85788d302b0c478522c5297af520e. 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/QZHZ32156222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9268d471b5ed52d1d5ec4f86c7180f3180e1870b16341610a6b370cf704cb169. 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/ARF862100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e9e34d9368abaa52be65530946ff5a551a83823d988ba90112b7507e825050. 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/ARF862200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dc2a041f1e89b851255bd437f9fec9946b9fff70cab1dcada07a1ed9923493. 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/ARF862100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d87a65834fdbcce99557901c0fcaadc99c1cde63a713ec7264cfce130eb9a88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARF862300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d87a65834fdbcce99557901c0fcaadc99c1cde63a713ec7264cfce130eb9a88. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ARF862300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95708a4ce9f4e8c39a87ae66b701e71d18e1cf9e373e92c28e06810e0384523e. 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/ARF862300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d78fa229f7ce9aa73a82fc5c6c734f493686e2ea3356fa4b0e9507fd4e142. 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/ARF862300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c704a45cd1a1434a3ad47e97e4195507b80209b02dc3d4394458ad63bacd855. 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/ARF862200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb3722dacd2c900a31aefbc10806b7419c96dc73011b8019365bf3befaf53b. 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/ARF862300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc3d05b16440ece771a77a41e17d8f1720f216766971633f6ba4cf9885012b4. 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/ARF862300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0270f835a7cfdbb0d49c57b56a40261f01ec6d48cc9f5cf24ca5b44ef123ba. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ARF862400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfb5ab047868090e6d17f476f8c0ecae200d6a0cc6157b6888ae9dbc37e622a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF862400002.