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 0x37208bc90786139df7543eb043599381e92a7bb9f7d1d145eba5218e5b5d5b69. 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/666314ee-0acb-4082-8f4a-390b7543a179.json and https://artists.proofprofile.net/proofs/artist/666314ee-0acb-4082-8f4a-390b7543a179.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 0x57d1625114b2699abefeba4e78a5a644be1ea20160b34fdd58912a9a37d9f516. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFL2146490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3df63992124d12c6b94c70bca712b5367b4eace949ad6e97933aa429319bde. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAFL2146531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe122982f13b4c7b1f4b3bc75df21da14f73507f245f2422fdee450c1028fbfe7. 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/TCAFL2146540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e01047a2c0a566871f35dcee2f51ebd36e00b0d8d6fb50f9775ed209453f16. 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/TCAFL2146543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe09a4c033058ea2d9b4b303302fbb9ae5259ed19bb628449a3c2bcd4d5dbfa. 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/TCAFL2146548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb632bbaa8cbee21f73e5d85f13dd2da128aadbbf294328747020b3a45ca7bbbe. 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/TCACP1639857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b87ef93cc98b6625826bb9c44b0b8e772bdef06674f73acb9dce38b11f0b4b. 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/TCACP1639858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6891a8a3ad13b071b28094bc5206ec77d0a326d17fa43798088b197870e9891. 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/TCACP1639877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade9c19754954d270a298bf0c0c982d049278f65780814a232df36869bcd2afe. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:49:57Z), 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/TCACP1639887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf3aa2633946faf1ba785bc8f01eacbf11d6369a275715cc5a5c9c8b6b7e0e. 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/TCACP1639893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae54d13e804a5515bad93d8716b032469b1d6d722d5a1db112f6f0a5feeb3ce. 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/TCACP1639895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22a7fd9304d3ba1afa3821f761f3fe1c8ee071c87bf180a9c36006fc0c5da5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACJ1505145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75426e02bca9adc5b5c10bb6d2e64259c58f5901efed47818122a48d3138f54. 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/TCACJ1505146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bc477125762f66a04d6950e0a18ec05186df7edae1d729bac8be56569f762. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACJ1505157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb72e8131c9b80a26b2d3614c7f7cd5743b7c71983e8f727809ffb99486be9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCABZ1418897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48700f6cf74d6822338bb423710fda205dd17ce700f9bdb0c8f0eac5245d7ed. 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/TCABZ1418899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cec64f3b13d12d803fd31716bb773be9a04977dd71aa195025f3a96b8ac2e6. 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/TCABZ1418904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7c386bbba896599792ff9835f6c40bc1c459b930d6fcd8edcb0ae03b482597. 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/TCABZ1418908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b25ccc6ae4e3aa7e458a8ab83d043ea24bb40f8c5a9db56e581c57ca51b66b. 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/TCABZ1418911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510408729769a07907502fde13ad089427180baa71df4915397ab8b5e7d81d6e. 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/TCABZ1418915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6dc9aa6ad9d4f187894cecb1a419095f6bcc796868c4f921eda5c25ac414a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABZ1418920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4762dc0aa17108adb4991d69b7265e12a86baeef6b729336d00b7f7d378c29e9. 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/TCACD1509571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f1e8b798732df52c8d9b5c5e4931c23fd5af296d5d1e247704237e47cc4e76. 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/TCACD1509572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b52cc9b2eb6722df20432558285141d27eb6f427dd72832ca2469483ebeb4e4. 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/TCACD1509573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c203db3a378266546542e9aeb10961fdac96362e0fd3577e57de0b2b274f6ea. 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/TCACD1509575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29080e89e8b64cea25d46eb8193c13c1c2d0b8eff60db9b0c94d2068b2db8eeb. 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/TCACD1509576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563c59ad3d591dab08a31e4d07eed0e958720af0eae862a109111f5324fd2dce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACD1509577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc23247cdb167bd35bd14cdb3dfd5f42be643524e1acb675e1e0ed65b61539d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCACD1509578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4381c117fe42cb8903e980da25b99b466134670f41cdf6ef2049c39803025a. 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/TCACD1509710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993ad2018e49f5f9480c5e25b9ffd2f8d0c8ef9ad661acfa7d8d457f2ebfba77. 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/TCACD1509923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ebd648cdb538ab4becb5956f16c459a02a374fc6c86f80969151aaf61ebd4. 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/TCACD1509949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecbc52c2416aa1dc9718ed637c65d18bcf5e8f1ff595b89900ba90caab5b6a2. 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/TCACD1509960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1222c3a4398713109179522c2e2ff3ca72d9404b5d45d50b5e651ebf41ae04e. 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/TCACD1512858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a85e049c4aca198579a8fce9f0440ae6a2b518b68309803c7a52eab5f4eac. 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/TCACD1512863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447779054cfeb9ca4657e7e828924cd45aafd2262910de52efa6d45632648b29. 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/TCACD1512867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aaff4813dfecd374ebc2837b703664284f4fbe84316d06806043b6731546c3. 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/TCACD1512868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4798f63de08836730ddd526a22bed6fc6a1924eac01d47872c8adeba47bef141. 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/TCACD1512871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e0af56e4f9ef1c38c640714fbe01d085bb61b55083564c80c8c9ae1b96ee9a. 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/TCACD1512874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6270489e05def93b50426751db6cd717e4c6f53c405812b889bfc32b93c9db7. 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/TCACD1512877.