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 0xdd2be8203ed4cb6f0f3c57e085df2c0571b275e6da3da3165dd2de690b9f8315. 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/0cf56d3c-e48a-46d1-abab-7dff937b50c0.json and https://artists.proofprofile.net/proofs/artist/0cf56d3c-e48a-46d1-abab-7dff937b50c0.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 0x2c11c630742c9a786cd6b641c6b2c794fe69a71a4a335d30527c1c2d4aae8a7f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ARF411301136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8acbf1ff8e08593d69783fb97267d5e573fcf2a0291e60a35bf41e20fce65f2. 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/ARF411900280.
Hold on, We're Going Home (Urban Love Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ed291a1b3a069edf19adf50bc5fb229011fdd06108ba735db3c8d18cf9c3f. 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/ARF412200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa3bf14da2d025d069563afef7ba31bf571ad3598b8cfff7aeecce51c43468. 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/ARF412400187.
Vintage Café Vol. 3 - Lounge & Jazz Blends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d24592e95a3dc6b97c0d44791a3c1d847e8ec30e59ceb84498ae23aaf71d77. 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/ARF411000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f404cbe694be62ee7d1f9d06f922fbbdd32041ba43e2f8528c14a08d4456ad8. 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/ARF412000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10920ca4193122fbca5704522918481b7a9b7d27176f3877cbccd18839c91a02. 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/ARF412000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a408b04503b0759795229451b0bdded8560fa20af8f7e6603c58389122dd7e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARF412400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5300fed9584100f2e4ffa374ffa70616daa09eb86f41b64a13d59c9e7157b. 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/ARF410802115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314852de02d93788616360303ae524590b2e60ddb8a6697421bc465dc18f0727. 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/ARF411000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10920ca4193122fbca5704522918481b7a9b7d27176f3877cbccd18839c91a02. 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/ARF412000243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d24592e95a3dc6b97c0d44791a3c1d847e8ec30e59ceb84498ae23aaf71d77. 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/ARF411000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314852de02d93788616360303ae524590b2e60ddb8a6697421bc465dc18f0727. 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/ARF411000144.
Hold on, We're Going Home - Urban Love Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6a41644d49d52b0986648dc778f1d1a4b9709009ebf1e0f23e1b36b9ce94d2. 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/ARF412100295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828ae4cd6a0746ae81328af537b44c158e8b8bac7362715999d96a618639ca65. 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/ARF411600031.