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 0xef04677b9e25416ab48948e50a2af560f8e996859ccd9a3483e65444c05f57c4. 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/0c8f4fba-58ed-47af-a191-f2082bfe4a75.json and https://artists.proofprofile.net/proofs/artist/0c8f4fba-58ed-47af-a191-f2082bfe4a75.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 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.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c73eb5a3566ba75b2c1cbd2c7a413eb58f06996a488d93be1e2bb79ddd8fd54. 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/DKADG0900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4e241a1934faafd2e4e799a3853ae36dcf2639f55a5c2a6e715d2e2e3085a3. 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/DKADG1200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcda523c6b422e751f79132aea376a3a193bd34e6fdb96c3d3fe300a8f6696f. 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/DKAXA9487101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41121f654ea79328b8b70d5fe5fd565254f71928443f632023404fdec86d8118. 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/DKADG9802805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ac42ce53f9ac013a79eaaaee3c56a39169073e4635bb1edc1c2046d7a7766. 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/DKAXD9400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98009d5dd8c9c30ced502b7de49572383e4b575225df995dbb7659a19fc8d209. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DK4YA1002301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518bf47f087c979240c93a44e8998add45c05646a74b99a09729789e4107bad0. 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/DKADG9901803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d452c35b4f9b7209d49e895132cee627d1f9e174da27b33bd12eeccf501011b. 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/DKAXG9300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe683e4d0e3b6f28b057d31056f58374c1faefffe5f59839a90832f1620770a. 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/DK4YA1002303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42fcddfdebaa2b60c2158e3082f149f2662bace7624aff143ae4f20f566a30. 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/DKADG9901809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71773b0ecc4c60780ef11445c13c2ad628428de0aea087f0f8e9fe0d9e26190c. 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/DKADG0800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40657d8e0e0b6f19a9ec769dc8b7cfbf68e12824edc8c17f93c6cf8007ac2f67. 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/DKADG8600213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfb70b3602a939721a5ad66fbae11a529d6699699dab6854871bbbfa4487443. 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/DKAXD9400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc038f84ab22944c0af0b14df9bc5403cc2f3a7b88561e854154b96c98ae5f87. 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/DKAXD9400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc90db36b66be6f9969f0c2159e9eed52476ea3b63c23c7381a89d0a07a7ab1c. 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/DKAXG9547614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be02bb6997f6c8a3993ff5566b98b78ef988faf29b594a8c81d79b478fe641. 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/DKAXK9660711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ac42ce53f9ac013a79eaaaee3c56a39169073e4635bb1edc1c2046d7a7766. 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/DKAXD9400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d33b3e0a23127dd705b50f43bdce64ec901d814945d238a307b08359371f25. 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/DKABA1102831.