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 0xea1c2dd8346e18df0186680c8e6e9c8ed87827cea8d628b962f687e9c6d485e2. 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/e15e6831-964b-4ade-b3ab-0cc82efcac5f.json and https://artists.proofprofile.net/proofs/artist/e15e6831-964b-4ade-b3ab-0cc82efcac5f.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 0x9fa8b0f824c52ea705a6e0053236d8830efcd7f7e7959577418a8262ed2b33de. 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/ARF411900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6789fcee9f38707c6e67f8742810404beb813f57e4ced97dcaa2650c3de85d70. 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/ARF412100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4525af456fd55ed7f95cffd7545e97cb5c570851463be899f14460cc8c9c45. 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/ARF410600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674df24e6a876ed22b0e0f9faf770b38c21f0ec8591f335e1e33d9cafe844fe. 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/ARF412300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b900a4c4abd1dc290aa74603afa6c73d0903684d450037d8c35bf59e029c81. 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/ARF410800490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4840e3a762d23cfc8bf49b449d152084423e69d3f1aae53af8024955e1cd8a. 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/ARF411100997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e7f82a0da3ba137b826330bbd30bd288e2b95b71b37ff26c7c0e8320898fe6. 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/ARF412300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4525af456fd55ed7f95cffd7545e97cb5c570851463be899f14460cc8c9c45. 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/ARF410600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4525af456fd55ed7f95cffd7545e97cb5c570851463be899f14460cc8c9c45. 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/ARF410600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113b0002ca64cc2281f85b7e93322ca9f77dbbbf96998d36b0f94f58ca079b72. 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/ARF411001436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6789fcee9f38707c6e67f8742810404beb813f57e4ced97dcaa2650c3de85d70. 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/ARF412100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4840e3a762d23cfc8bf49b449d152084423e69d3f1aae53af8024955e1cd8a. 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/ARF411100997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81e5e8823d4c82e0b63ab79bbffd07a9eb4c75b24d55192a59749b645d42cbe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARF412200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24737db148abcafcfd04829a06d16a9550bbafa9580c654193a94109f349843a. 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/ARF412000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674df24e6a876ed22b0e0f9faf770b38c21f0ec8591f335e1e33d9cafe844fe. 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/ARF412300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ccba56858ae295570c95478d8bfe6dab8b8e86451564c3702f38d929165a29. 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/ARF412200331.
Vintage Café: Lounge and Jazz Blends, Vol. 23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674df24e6a876ed22b0e0f9faf770b38c21f0ec8591f335e1e33d9cafe844fe. 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/ARF412300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709787f7b8401dfbf9da46519729b16aae525f9a73f6ad6203ac6b3d69baba4a. 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/ARF410600495.