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 0x7425b5ad35dcbfb72af4d74f5d19a96a70b21c80f6bd1eafdcfb1de55bf178e6. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15c72562-ecc9-4b8f-8a88-798d9ccf5ef6.json and https://artists.proofprofile.net/proofs/artist/15c72562-ecc9-4b8f-8a88-798d9ccf5ef6.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 0xf27e46596c588a314127d9612b37400c2dbb4db7de97d6f8eab42a4253ecfb14. 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/DELS42311102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a76a88a4bbb2973676dde626e3c3241d630fb2cfbdad35967569fccd8db42c. 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/DELS42311104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e2975abaee1775a9b79647b77a3fbac398d8f844e09ac40cdbb090577917fb. 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/DELS42311105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4817ce54a5ae5d184d6eb8003c724146416034f9c44ff65bb194bece399161. 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/DELS42311107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab245d0b6537ff690d18e03e8b040825019c0fe3e604fff21c93bb5ec22d8929. 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/DELS42311108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814048681f273b0cc24c9474e37bae862f451032c4f1658cea8cdcdf2a8e05b. 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/DELS42311109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41fca8cd61b628f3b7ebcf7387e662f973a032605098e701647591f06a45dbc. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DELS42311101.
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 0x6a3be0a569225d10d18ec9b5a16cf10a9409f946f37466dde72bc4f86b704530. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DELS42311103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7af3164899b281dae9cdbbff5841b4deb8435d444e505286fd1c0a6ce0b33. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DELS42311106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de74fd541b1eba655217385e3aa271caccea5ddbf5971558532610362e1ee55. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TX2438745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b19123b865f7befb26d830df078859d1af01900ae39030b45f80615abbb747. 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/DELS42411601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3fec5668ade7d2e69ea9a74adbc545284fd1602870fb2fc8a7a7f0f529f8cc. 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/DELS42411605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3d2093b313f72789b388cdddb11c5b7aebfe7658bbef17b76b57f47396f46. 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/DELS42411608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa0d99a2957944488fbb155331dd19b41b999d64c633dbb742d86cd8dde7a3. 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/DELS42411609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a010c2901ffa7168c64aaad647db767be8012efc6420e147a6005b6b48eb6b9. 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/DELS42411610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08735f3a0340f65b08aa87de9a112cba62c927ff344766c431584a71f4e9aaff. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DELS42411602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a630f579586f2ea450a02c2b71cddf3056ae5a67af2a2cdb6a8fe95e37035. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DELS42411603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b21cc2bec6198a25cc77396dde8bc8481f66e2c0a4f755d81c880c79b64b36. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DELS42411604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6274e911ae5fb61adc6ac947ce7f50388405de52d281072526d2ee9b86b691f. 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/DELS42411606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a38ee1892f819aedd4583c59911b726ff60fb40dbaa074992a60833d300238. 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/DELS42411607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e363c19994ef90197752d551fc99c86da99f15af6eb7483f4f0fbb0e32ca1c5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMFME2493349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b29470df59afc38727db1cf96a32e1998caac86a62542275df362570e178537. 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/DELS42512201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd86034ee9852f9e85cc7be42fde15fb51a38ae0399e452a549a74f53ea88a5. 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/DELS42512202.