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 0x51db26d117adb30c98cfef7fa55b6ee8f792ccdce122da953ce839bc6dcb37ef. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ede2af5-21f0-4ff6-a505-1c2c155a7fdb.json and https://artists.proofprofile.net/proofs/artist/8ede2af5-21f0-4ff6-a505-1c2c155a7fdb.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 0x32084875814594ee3b43e51adc08e030e1b376c1d7c82776c819083f0d3814b4. 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/DKBV79300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd66cf1ae3069df753d74bb56fbaf06ba4b092954ed67b25c29b9180b5d74189. 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/DKAAH9500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf730aa605d6493f53e1437eadd8ba9162d3508e4310787be03c80672ff042. 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/DKUM71400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf19fbd7229d793956248ff319cc21773cfbde29194b7a729ffd27625b318d2f. 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/DKUM70800990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405bc95381d70bd294099f94f1f2b6d23dec3d44229a52ffe490071c3e00f81f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DKUM71300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657d8d3e0173c5b7765640f0451892354469786a9553fa173d504a55268435cf. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:09:45Z), 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/DKAAP0300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf2962027f04f1eae13ac8b1840b4a28455c82dbe25d9a336ad5a8e2872696. 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/DKPNH9700708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246d4cb39c6030642d4be8e423aa68f89aebd5f46b60fb16fb997b925f5ef34d. 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/DKAAH9500419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7889beaf2f810b50d4bca8ca758e4184dbf1a612c9b4ef9273978c47d1136db. 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/DKBV79701304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64290589dcd0b7523e7ef71a9dd137d25a89c1eb1309f83fe8bd29a2dea3e8de. 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/DKUM71900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4486d2ac71c1e56f4af1e128b5815c0c44ab360c0d9aa6c69787586b1cded48b. 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/DKBKA0300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fee52aa49407eaf6e3b5dcfcce132a2b2a8dafa7495b573848c5d2d64fc123. 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/DKBKA0300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32084875814594ee3b43e51adc08e030e1b376c1d7c82776c819083f0d3814b4. 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/DKBV79300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bcc69dab2cec4e0f77ec56d15ca5741d7c5f68f61b94abba7669599d8f359d. 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/DKBKA0300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf730aa605d6493f53e1437eadd8ba9162d3508e4310787be03c80672ff042. 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/DKUM71400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb64a8fc5f73a47ec5e8e882c13b2806adb6ecac0ebb59e43370c86fdc22aca0. 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/DKUM71300826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73122ef8cdb094d2183a2e33a10c8118abb18cfaac89f6344ef2655720811479. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKBV79701409.
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 0xb86ba77af3bf6ed092a440aa096b2acc8775db48538351e2b2860b8b45a381a2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKBV79701909.