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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 0x7fee9fd87b8f783864e01fee803eb1926dcdf5b3b5d440270cccdbf41f167da4. 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/b719aa88-1508-4aaa-bb66-643630948691.json and https://artists.proofprofile.net/proofs/artist/b719aa88-1508-4aaa-bb66-643630948691.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 0x45ee22c4fc7f614ca6d694c2d49294520889b96dc807b35c3f2af49d5c3acffd. 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/DKXV31300904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca044be99ed6c851f8a12ede381ecdda39e3228f2cc4ce0a5b8fd9ebadbaff3. 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/DKADG0700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1a8e6dc28d34ecf6a0c52af01dd179b2d83f09ff8c41fb694aa107f74e0ba1. 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/DKAXD9400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92222e62dbcc1607f8e7dc7665a1e22e80cd4bea81adaf842b6a4f8fca094f9c. 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/DKAXD9400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfb70b3602a939721a5ad66fbae11a529d6699699dab6854871bbbfa4487443. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DKAXD9400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157d410b828131f80d28961e34a8cd6af4df5d79001320c5fca7506b5c5985fa. 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/DKAXD9400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7451d1e2f3aede60a46d1b66b42513dee8738854222a39576c7266de94aa5860. 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/DKAXD9400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3a54352befb95f922e6066206ae9ead3ea8c4ae1d3a39c36023b0f95947277. 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/DKAXD9400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de586d7205afd62019f9e402927ae98c0b73e92f391d1b93868ac5fe76471a. 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/DKAXD9400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc038f84ab22944c0af0b14df9bc5403cc2f3a7b88561e854154b96c98ae5f87. 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/DKAXD9400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d657502de813c6b6ccc38f3aad1b0dc9763612eb4c872c22a3b7d7bc78150. 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/DKAXD9400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb595866f164df990d4df8a58f51dca6db004fa9611ca34ba7419b585f872934d. 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/DKAXD9400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a81bb72d9c48e26998385031539441a157cc8cc97280b96a100969310484b2. 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/DKAXD9400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59165a37989b2ca2f1dbdabe808739ea6039b98e6618bdad23938f03f5d6b331. 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/DKAXD9400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e023900a5fd80e6e035aaf2f3892c908d69efc5e3ec4091c0d19687241cc64. 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/DKAXD9400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72fc715743a0e94c56bb3c43dfac141c00f1f2cb395151a4b6636a70585c43. 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/DKADG0602314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b88f9935e869fc54e39de95312dc467f16447f36d04078c4c7a8bb4b0e30fa. 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/DKAXA8900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7679dea03b47fdd899aa86acbc8dba2dccbb9f2585a53fdc2a4b7aca4a847a45. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DKENA9401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2678093d45b4d1945fcff80c878375c55e72248f38171e8d244d354d29adcd03. 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/DK92A6025201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5f7ea5fa662eed7a70ac575d2454332d097d2b2d50be51377ac7bf3be1856d. 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/DK92A6025203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441e2c170eb48eec0703eac164473bf295ad97ba19136092716e47816ece770b. 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/DK92A6025205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4e0cf03e7997fb8ae5bf69ec142cb75eb6fbd3c816037cbc101a1f4a5507e5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:24Z), 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/DK92A6025209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9495bfc915bec7fec80e99b1ca14c561e98857b264c18acb41cf6aedd843901b. 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/DK92A6025214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a2f7cf939807aee3bb550ee4b782e845b64e364d338f30d753f65a2528dd9. 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/DKUM72300576.