Piece by Piece may refer to: Piece by Piece (book), an autobiography by Tori Amos Piece by Piece (2005 film), a documentary film Piece by Piece (2024 film), an animated biographical film Music Pi
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 0x92c0d32068a9b781b31218c0da0f12abd80bac7f3403ecb5d9ca1bd9c594470e. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bc54fca-02a4-4d09-9b67-c6277f15189b.json and https://artists.proofprofile.net/proofs/artist/1bc54fca-02a4-4d09-9b67-c6277f15189b.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 0xe68c884c381388f7110c0bd679fe59ecd990d3557ac05ddfd83cb7b3d1b539d6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMLD61406187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2297b5876dd82aa9966f4002114adadd1bf4f44b3c6f6f79e486ab098e7f3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMLD61406188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a9bd018414dbd78da5a15c7502e920d97572f1bf3d3d0b066c6f980056dfeb. 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/QMLD61406189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f70a0bb2a3ef08aea420e66d108dc4732f2d762da1e22121b8c4f50925feb. 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/QMLD61406193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f7b7f71f89e5ac309c535ee3e2f677dd7dfda285aaad32ed74129162349806. 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/QMLD61406194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6219abe455f44df782b95e2636a9508a13e19dae9fdb581ea0b771b5a2ba29a9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA2P1398207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365ddd6d95e58418cc179d85f8483d6bb5318d864c7c55cd82d5d0f91962345f. 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/USA2P1398210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfc62d6deaf28583100f7ea22b2816e6d27bd850cf44e5d87f6d3bfa2e94ea8. 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/USA2P1398211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afacac6eca77a0791fbf01bc0fba64d7209b74f16521ffaeb4d150921d32e49. 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/USA2P1398214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bafb58677f2c5ce139b02d8e6d6dc16f7f6e2a15cfd777a07e1efebb4fc420e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USHKB1001701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f604bba2052526c1d960025faa3697444ef9eff6abe1317b95c3ff603ec35b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHKB1001702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc37e6c6f5c8fa9be26d68b40e342dc099599aec4bcfc056f84e48072e29f7eb. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USHKB1001703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79dd998eb65d4a3f00e24064bdddcd2481b3a3137da9a43876d07f1eac871bb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHKB1001704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfaf9a3dc4c0a6fa607ac7dfd3b5ad515cd8eca069dd24c9474d5325a519d29. 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/USHKB1001706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be073284087c15621bb1e44c016578643514ebafeb00128ec2407d2c400aa44. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHKB1001707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388f54ce66b5f49d5d3c27e072624deb876ad4e9b7fc1f1267ce088207eb038b. 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/USHKB1001709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35bcc008089d9b19f48a15d2f873d382a2860353f8f09fde5f67731f2e2dac9. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHKB1001710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823eaffe833d1fad0754c346c21ddd9baf2d3d1c32a73597398d44a02ee2d5a6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHTV0810226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5161b9b5601514c4d9204270969eb3d5e3103da7b37fb98906fbf797efd497a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USHTV0810227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ddd43ecf68368f00bf81af27eb7454d9c2b91e3bde7758f2b0ec9c0522e8dc. 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/USHTV0810228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f1f60deb94de334f3742d86b1fe4a59b76f0c3b592c9a124baa28ac593617. 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/USHTV0810229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd8677b20f6ce9698cacbea1706bcfc096dbf7ebb33d155d74572ecfccd07d6. 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/USHTV0810230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89ca8ab30cf25a4354b252918469cd1be135c12064a92503561bf02b86f5601. 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/USHTV0810231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddc92a15810e314065ebc5b25a825fa89cc2afd454dd204bc50518c7742a887. 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/USHTV0810232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77f3e43c793eaedbbe5805797ad791498a703b51bb69165ebb613f5acf6b54c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHTV0810233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda610f36e09e2b173c57d266517d764e3ecaf4d7a6d525ede208e36f00f354f0. 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/USHTV0810234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548c02b47fb228d242855eefdf5958ed6a561a2289916cf2156ece2c34c75d72. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHTV0810235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d943cffab26f957b771f977f4a34ef9f1b4a1f1c23f8bd60c7cff61c0204444. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHTV0810236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7951f2ac9f551e29e37f10ab1acd20422ab5ab6613c1c842db6cf0957e9433. 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/USHTV0810237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57747e35187098d92b7ea9da5b77e22acc7cb0d72c927cb47584cd7f0c80a387. 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/USHTV0810238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77db65257af336537d3b13f3d9edc4254e814e4dc40d8353cf5e189938c33f85. 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/USHTV0810239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131d25a15fd694652848206da279b04c8192788c54f085de6fc0f2753cdaa855. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHTV0810240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74898913b6dd3573466bf40ff9c61b851e08daa44d0fa3c5642a968d1b63ae. 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/USHTV0810242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e949e15423cc2a9a3dc32f3287b026a57912c480c16d0a7c719a9f6ffc633cf. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCACM1610622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6472b416d190ea225c029e07ac1b1f37b6c2c8954c13f3d3d1a88134a35232. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US4HY1000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c58a052b595cfdefdfad068979b7e6a1847037467f7252245fdbcb6cb6529. 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/US4HY1000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c5c4c81c9dcdc4f918e5d30f572864ecde0cc447a80aeeb51bae736cb8696. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US4HY1000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181d4106cea84afc9f694bd48f5f28ecbf2aec134c2a0f900d973468eeb76e95. 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/US4HY1000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c38274192e6596833d3bd743fb65386aadc93d5ce0eaa37c11ad7a962a76b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US4XR0941102.